Gold telluride minerals (responsible for the name of Telluride, Colorado) are the most notable natural gold compounds. Charles Wood (ironmaster) brought samples of the metal to England in 1741 and investigated its properties, observing its high melting point and its presence as small white grains in black metallic sand. The periodic table is divided into seven periods, each starting on the far left. We have grown leaps and bounds to be the best Online Tuition Website in India with immensely talented Vedantu Master Teachers, from the most reputed institutions. The existence of a +3 state is debated, as the state could be an illusory state created by +2 and +4 states. Zirconium is mainly used as a refractory and opacifier, although minor amounts are used as alloying agent for its strong resistance to corrosion. There are 18 elements in Periods 4 and 5. The element in group 15 and period 4 is arsenic or As. The middle groups' names begin with the letter B. or What is the element found in period 5 group 10? The Transition Metals. Ionisation Energies. Yttrium has no known biological role, and exposure to yttrium compounds can cause lung disease in humans.[11]. Shiny, soft, highly reactive Ethanol, C 2 H 5 OH, is used extensively as motor fuel in Brazil. The periodic table helps in the systematic study of the majority of natural elements. Across a period, the properties of elements become less metallic and more nonmetallic. What element is in Group 5 Period 3? halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. A minor application of ruthenium is its use in some platinum alloys. These superconducting alloys, also containing titanium and tin, are widely used in the superconducting magnets of MRI scanners. What is the difference between mango plants and maize plants in terms of root system? It is also used for making particularly low melting point alloys, and is a component in some lead-free solders. The Group 11 is composed of copper (Cu), silver (Ag), and gold (Au). Naturally occurring technetium occurs as a spontaneous fission product in uranium ore or by neutron capture in molybdenum ores. What element is in group 15 and period 5? Strontium is a soft metal and is extremely reactive upon contact with water. What is a main group element in period 5? In general the halogens comprise the most reactive group of non-metals. What important example, shown in the picture, is given regarding a real-life The table below consists of 118 elements of the periodic table, sorted by atomic number, atomic weight, symbols, density, discovered year and the group. In the full periodic table, Groups 3 to 12 contain the transition elements including: | 4th Period: Mn, Fe, Co, Ni, Cu, Zn, | 5th period: Mo, Ag, Cd, Sn | 6th period Pt, Au, Hg, Bi. How many grams of Na2SO4, will be produced if 2.9 L of HCl are also produced at a e. The element in group 1 and period 7 is francium or Fr. For main group elements (i.e s-block and p-block elements), the valence electrons are the electrons present in the outermost orbit. Like the other metals of the platinum group, ruthenium is inert to most chemicals. Iodine's relatively high atomic number, low toxicity, and ease of attachment to organic compounds have made it a part of many X-ray contrast materials in modern medicine. Group 5A (or VA) of the periodic table are the pnictogens: the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metal bismuth (Bi). Silver has a FCC (Face centered cubic) crystal structure. There Group 5A (or VA) of the periodic table are the pnictogens: the nonmetals nitrogen (N), and phosphorus (P), the metalloids arsenic (As) and antimony (Sb), and the metal bismuth (Bi). What is the element in group 10 and period 5? Count from left, 1 period has 2 elements--H and He, 3 period has 8 elements. Because of this function, radioisotopes of iodine are concentrated in the thyroid gland along with nonradioactive iodine. The group number is equal to the number of valence electrons if the element is in the s block. Example: Na- 2,8,1 - There are three shells, hence the period number is 3. . valence electrons in each atom: Draw Bohr models for the elements listed below and state the number of valence This silvery, malleable other metal is not easily oxidized in air and is used to coat other metals to prevent corrosion. This site is using cookies under cookie policy . He postulated that:- The properties of elements are the periodic function of their atomic masses. It was not until the early 20th century that niobium was first used commercially. However, its presence in ocean water has given it a role in biology (see below). Palladium complexes also show marginal antitumor activity, yet its poor activity is labile compared to platnium complexes. The element in group 15 and period 4 = Arsenic c. The element in group 2 and period 3 = Magnesium d. The element in group 18 and period 6= Radon e. The element in group 1 and period . It is widely used in thin-films to form lubricated layers (during World War II it was widely used to coat bearings in high-performance aircraft). Palladium was isolated by William Hyde Wollaston in 1803 while he was working on refining platinum metals. Iodine is the heaviest essential element utilized widely by life in biological functions (only tungsten, employed in enzymes by a few species of bacteria, is heavier). There are four ways to find the charge of an element: Use the periodic table. The Group 7 elements are called the halogens. Lets get the notation correct. Recycling is also a source of palladium, mostly from scrapped catalytic converters. The main group elements, along with a few light transition metals, are the most abundant elements in the universe, solar system, and on Earth. Metalloids. 1A and 2A are the first two groups, while 3A through 8A are the last six. Niobium, or columbium, is a chemical element with the symbol Nb and atomic number 41. Atomic number of this element is 6 and it is . Which element is in Group 4 Period 5? [30] In humans, tellurium is partly metabolized into dimethyl telluride, (CH3)2Te, a gas with a garlic-like odor which is exhaled in the breath of victims of tellurium toxicity or exposure. Period 1 only includes two elements (hydrogen and helium), but periods 2 and 3 each have eight. Its short-lived gamma ray-emitting nuclear isomertechnetium-99mis used in nuclear medicine for a wide variety of diagnostic tests. Which element is a metal in period 5 of the periodic table? https://en.wikipedia.org/wiki/Period_5_element, https://dbpedia.org/page/Period_5_element, https://quizlet.com/168894421/period-5-elements-flash-cards/, https://artsandculture.google.com/entity/period-5-element/m015c85?hl=en, https://www.chemeurope.com/en/encyclopedia/Period_5_element.html, https://homework.study.com/explanation/how-many-elements-are-in-the-fifth-period-of-the-periodic-table.html. Indium is a chemical element with the symbol In and atomic number 49. Nickel has been discovered in a dagger dating to 3100 BCE, in Egyptian iron beads, a bronze reamer found in Syria dating to 35003100 BCE, as copper-nickel alloys in coins minted in Bactria, in weapons and pots near the Senegal river, and as agricultural tools used by Mexicans in the 1700s. Molybdenum is a Group 6 chemical element with the symbol Mo and atomic number 42. Both methanol and ethanol produce CO 2 and H 2 O To draw the Lewis structure of any compound, we always use the concept of valence electrons (number of electrons in the outer shell of each atom). Iodine has only one stable isotope. The element in group 10 and period 5 = Pd b. The outer electron subshell of the atom is shown by blocks on the periodic table. [10][15] There is evidence to suggest that the use of nickel in antiquity came from meteoric iron, such as in the Sumerian name for iron an-bar ("fire from heaven") or in Hittite texts that describe iron's heavenly origins. Zinc ores continue to be the primary source of indium, where it is found in compound form. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules. The name of zirconium is taken from the mineral zircon. Two prominent groups of ores from which it can be extracted are laterites and sulfide ores. 6 elements = Li, Na, K, Rb, Cs, Fr, Click on the group number for the Alkali Metals family at the top of the table. The English chemistCharles Hatchett reported a new element similar to tantalum in 1801, and named it columbium. configuration: silver (Ag), chemical element, a white lustrous metal valued for its decorative beauty and electrical conductivity. These two rows are kept at the end of the table mainly named as lanthanides and actinides. Elements in these groups are collectively known as main group or representative elements. An acid, Group 2 on the periodic table corresponds to what family of elements? Classical elements typically refer to water, earth, fire, air, and (later) aether, which were proposed to explain the nature and complexity of all matter in terms of simpler substances. Thus in order to understand the trends and properties groups and period are of great significance. Like rubidium, it has 5 electron shells or energy levels, and in accordance with the Madelung rule it has two electrons in its 5s subshell. Elements toward the left side of a period are all metals, while the elements on the right side are generally nonmetals. Periodic Table Periodic Table of Elements The periodic table groups the elements according to their atomic number and draws attention to those with related qualities. Molybdenum-containing enzymes are used as catalysts by some bacteria to break the chemical bond in atmospheric molecular nitrogen, allowing biological nitrogen fixation. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. 15 the top right hand corner of your screen check ( ) the box next to Wide. This [11] In 1804, J. They are placed in the vertical column, second from the right, in the periodic table . Low electronegativity. [7] Yttrium is almost always found combined with the lanthanides in rare earth minerals and is never found in nature as a free element. . Radioactive indium-111 (in very small amounts on a chemical basis) is used in nuclear medicine tests, as a radiotracer to follow the movement of labeled proteins and white blood cells in the body. In Europe, however, there was a slightly different structure in place. He ordered the elements in the periodic table so that those with comparable properties were in the same vertical columns. Chemistry. If you look at the periodic table, you will find the metals in groups (from one to 16). There are 18 groupings in total. It is also possible to analyze the ionization energy, electromagnetism, electron affinity, and so on. Metals are good conductors of heat and electric current. Ions are created by changing the number of electrons in an element's atom. It is one of the rarest precious metals and one of the most costly (gold has since taken over the top spot of cost per ounce). The name comes from Greek mythology: Niobe, daughter of Tantalus. Shielding of the Nucleus. What family is this? The atomic mask off 47.87 and magnesium The group 10 metals share several uses. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Group 10, numbered by current IUPAC style, is the group of chemical elements in the periodic table that consists of nickel (Ni), palladium (Pd), platinum (Pt), and perhaps also the chemically uncharacterized darmstadtium (Ds). The common element in the Group 4 and Period 4 is Titanium. [20] The metal was found in small grains mixed with gold in river deposits, which the workers sintered with gold to form small trinkets such as rings. [31] Iodine is required by higher animals, which use it to synthesize thyroid hormones, which contain the element. 18, The horizontal rows on the periodic table are called periods , how many periods are c. The element in group 2 and period 3 is magnesium or Mg. d. The element in group 18 and period 6 is radon or Rn. Using the group and period numbers, identify the elements that are located in each of the following location. In the below periodic table you can see the trend of . As a rule, period 5 elements fill their 5s shells first, then their 4d, and 5p shells, in that order; however, there are exceptions, such as rhodium. Niobium has physical and chemical properties similar to those of the element tantalum, and the two are therefore difficult to distinguish. The period of an element is represented by the principal quantum number (n) of the valence electrons in the electronic configuration of an atom. Group ten metals are white to light grey in color, and possess a high luster, a resistance to tarnish ( oxidation) at STP, are highly ductile, and enter into oxidation states of +2 and +4, with +1 being seen in special conditions. Create your account View this answer The periodic table is divided into 7. Indium has no biological role and can be toxic as well as Antimony. Niobium is used mostly in alloys, the largest part in special steel such as that used in gas pipelines. In a similar way to aluminium salts, indium(III) ions can be toxic to the kidney when given by injection, but oral indium compounds do not have the chronic toxicity of salts of heavy metals, probably due to poor absorption in basic conditions. Interest in the metal grew after Wood's findings were reported to the Royal Society. common property of the elements in this family? their symbol. The first published report of platinum was written by Antonio de Ulloa, a Spanish mathematician, astronomer, and naval officer who observed "platina" (little silver) in the gold mines of Ecuador during a French expedition in 1736. The elements of Period 4 are Potassium (K), Calcium (Ca), Scandium (Sc), Titanium (Ti), Vanadium (V), Chromium (Cr), Manganese (Mn), Iron (Fe), Cobalt (Co), Nickel (Ni), Copper (Cu), Zinc (Zn), Gallium (Ga), Germanium (Ge), Arsenic (As), Selenium (Se), Bromine (Br), and Krypton (Kr). This is expressed by the law of periodicity." Dmitri Mendeleev, Principles of Chemistry, Vol. However, in terms of its nuclear structure it belongs to the s-block, and is therefore sometimes classified as a group 2 element, or simultaneously both 2 and 18. . The melting point of silver is 961.7 C and its boiling point is 2162 C. Technetium-99 is used as a gamma ray-free source of beta particles. All these metals occur in variable oxidation stages, mainly +1, and +2, (Table II-11.1). Tellurium is a chemical element that has the symbol Te and atomic number 52. In the universe and on Earth, iodine's high atomic number makes it a relatively rare element. Silver is a metallic chemical element with the chemical symbol Ag (Latin: argentum, from the Indo-European root *arg- for "grey" or "shining") and atomic number 47. 2.If 3.4 L of HS of the following location. Iodine is a chemical element with the symbol I and atomic number 53. Group 10 elements are resistant to tarnish (oxidation) at STP, are refractory, and have high melting and boiling points. Very rarely the element can be found as grains of native (free) metal, but these are not of commercial importance. Alkali Metals. helium Chemically, helium behaves like a noble gas, and thus is taken to be part of the group 18 elements. Palladium plays a key role in the technology used for fuel cells, which combine hydrogen and oxygen to produce electricity, heat, and water. Cadmium is a chemical element with the symbol Cd and atomic number 48. What are 3 similar properties of these elements? The number of the group is always 3 if the element is in the f block, Example: Cerium (58) belongs to the 3rd group in the periodic table. 7 Using the group and period numbers, identify the elements that are located in each of the following location. Silver is located in Group 11 (Ib) and Period 5 of the periodic table, between copper (Period 4) and gold (Period 6), and its physical and chemical properties are intermediate between those . Electrons = 4 Electrons = 7 Electrons = 2, a. Nitrogen (N) b. Chlorine (Cl) c. Calcium While many medical antimicrobial uses of silver have been supplanted by antibiotics, further research into clinical potential continues. Yttrium can cause lung disease in humans. The group number is determined by this formula.Example: Fe(26): $[Ar]3d^64s^2$Group = number of electrons in(n1)d subshell + number of electrons in (n)s subshell = 6+2 = 8. Identify each element as a metal, metalloid, or . . The International Union of Pure and Applied Chemistry (IUPAC) agreed that the official system for numbering groups would be a simple 1 through 18 from left to right approach to avoid misunderstanding. The letters A and B are used in the conventional system in the United States. Alkali metals Group 1: very reactive metals which do not occur freely in nature. There are seven periods in the periodic table, with each one beginning at the far left. What element is in Group 5 Period 5? It is a post-transition metal and is in the p-block of elements. Rhodium detectors are used in nuclear reactors to measure the neutron flux level. Period A horizontal row in the periodic table. there on the periodic table? Indium was discovered in 1863 and named for the indigo blue line in its spectrum that was the first indication of its existence in zinc ores, as a new and unknown element. Predict the product(s) of this reaction: (Don't worry about balancing) Zirconium forms a variety of inorganic and organometallic compounds such as zirconium dioxide and zirconocene dichloride, respectively. 30. The chemical elements are organized into particular groups. The relativistic stabilization of the 7s orbital is the explanation to the predicted electron configuration of darmstadtium, which, unusually for this group, conforms to that predicted by the Aufbau principle. Lanthanide and Actinide Series: Variable positive charges. Apply the rule of the periodic table to your element. Vedantu LIVE Online Master Classes is an incredibly personalized tutoring platform for you, while you are staying at your home. A periodic table group is a column, while a periodic table period is a row. Applications in solar panels and as a semiconductor material also consume a considerable fraction of tellurium production. What element in period 5 has 7 valence electrons? a. The elements in each group have similar chemical properties. It was used for a long time as a pigment and for corrosion resistant plating on steel while cadmium compounds were used to stabilize plastic. Indium's current primary application is to form transparent electrodes from indium tin oxide in liquid crystal displays and touchscreens, and this use largely determines its global mining production. 1. True or false. Most of them are liquids at room temperature. Group 18 elements, on the far right side of the table, . If the element belongs to the p block, the group number can be calculated using the formula (number of valence electrons + 10), for a group. Zirconium is obtained mainly from the mineral zircon, which is the most important form of zirconium in use. Most molybdenum compounds have low solubility in water, but the molybdate ion MoO42 is soluble and forms when molybdenum-containing minerals are in contact with oxygen and water. Alkali metals are soft, ductile, and good conductors of electricity and heat. Where are these found naturally? Mendeleev discovered that the properties of elements were related to atomic mass in a periodic pattern after analyzing their qualities. Palladium is a chemical element with the chemical symbol Pd and an atomic number of 46. Technetium, ruthenium, rhodium, palladium, silver, tin, and antimony have no biological role. Atomic bomb dropped on Nagasaki. It is an alkaline earth metal, a relatively reactive group, although not nearly as reactive as the alkali metals. The Palladium which is a chemical element with the symbol Pd and it posses an atomic number 46. Group 18: noble gases. The Group 8A (18) elements _______. The concept of electronic configuration has replaced the older concept of valency and valence electrons. What is the period 5 element with the second greatest atomic weight? [25] The first excimer laser design used a xenon dimer molecule (Xe2) as its lasing medium,[26] and the earliest laser designs used xenon flash lamps as pumps. Antimony compounds are prominent additives for chlorine and bromine containing fire retardants found in many commercial and domestic products. I love to write and share science related Stuff Here on my Website. Less dense than other metals. I am currently continuing at SunAgri as an R&D engineer. Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. 2, 1902, P. F. Collier, p17. Group 17: halogens. What is the symbol for the element that is in group \ ( \mathbf {5 A} \) and period \ ( \mathbf {2} \) ? In the periodic table, elements are categorized into different groups and periods, which aids in the study of the compounds created by those elements. Elemental yttrium was first isolated in 1828 by Friedrich Whler. Atomic properties of the chalcogens are summarized in the table. ***** Make sure the Wikipedia tab is selected in order to answer the following questions: The vertical columns on the periodic table are called groups , how many groups are Nickel is a chemical element, metal placed in the periodic table of Mendeleev in the group 10 and period 4. What is the atomic number of the element in period 5 group 11? The group 10 metals share several uses. Rhodium is a so-called noble metal, resistant to corrosion, found in platinum- or nickel ores together with the other members of the platinum group metals. According to Madelung's rule, the electronic configuration of palladium and platinum are expected to be [Kr] 5s2 4d8 and [Xe] 4f14 6d2 5d8 respectively. 2021-22, ATI Palliative Hospice Care Activity Gero Sim Lab 2 (CH), Cecilia Guzman - Identifying Nutrients Gizmo Lab, The Deep Dive Answers - jdjbcBS JSb vjbszbv, Leadership class , week 3 executive summary, I am doing my essay on the Ted Talk titaled How One Photo Captured a Humanitie Crisis https, School-Plan - School Plan of San Juan Integrated School, SEC-502-RS-Dispositions Self-Assessment Survey T3 (1), Techniques DE Separation ET Analyse EN Biochimi 1. O4 are reacted, how many liters of HCI would be produced? Groups 3-12 (Transition Metals): Variable positive charges. connection to these elements? It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". This period is known to have a large number of exceptions to the Madelung rule. The two bottom rows have 32 elements belonging to period 6 and 7 hence are separated from the rest of the table. The two periods below the main body of the periodic table make up the f-block (the lanthanides and actinides).The type of orbital that receives the last electron correlates to the block of an element. Element Neon (Ne), Group 18, Atomic Number 10, p-block, Mass 20.180. Silver and Au belong to the so-called noble metals. e. The element in group 1 and period 7 is francium or Fr. Like the other halogens, free iodine occurs mainly as a diatomic molecule I2, and then only momentarily after being oxidized from iodide by an oxidant like free oxygen. Owing to the diverse functions of the remainder of the enzymes, molybdenum is a required element for life in higher organisms (eukaryotes), though not in all bacteria. Tellurium was discovered in Transylvania (today part of Romania) in 1782 by Franz-Joseph Mller von Reichenstein in a mineral containing tellurium and gold. Iodine is found on Earth mainly as the highly water-soluble iodide I, which concentrates it in oceans and brine pools. The metal was first isolated in 1781 by Peter Jacob Hjelm. An element has atomic number . [17] Wollaston named it after the recently discovered asteroid 2 Pallas and anonymously sold small samples of the metal to a shop, which advertised it as a "new noble metal" called "Palladium, or New Silver". In 1864 and 1865, a series of scientific findings clarified that niobium and columbium were the same element (as distinguished from tantalum), and for a century both names were used interchangeably. Common Groups and Periods of the Periodic Table. a. 2. Other applications of niobium include its use in welding, nuclear industries, electronics, optics, numismatics and jewelry. Metals are located on the left side of the table, whereas nonmetals are located on the right.The columns are referred to as groups. For this reason, main group elements are sometimes known as representative elements. It was discovered in 1817 simultaneously by Stromeyer and Hermann, both in Germany, as an impurity in zinc carbonate. In modern times tin is used in many alloys, most notably tin/lead soft solders, typically containing 60% or more of tin. Radioactivity and the Decay of Nuclei. Although cadmium has no known biological role in higher organisms, a cadmium-dependent carbonic anhydrase has been found in marine diatoms. Atomic Number of Elements There are about ninety elements found on Earth. Click on the name of Table 12.19.10 1.10.2 Patterns in the periodic table 1. Groups are the vertical columns that go from up to down. The fifth period contains 18 elements, beginning with rubidium and ending with xenon. The element in group 15 and period 4 = As, c. The element in group 2 and period 3 = Mg, d. The element in group 18 and period 6= Rn, e. The element in group 1 and period 7 = Fr. Only 63 elements were known at Mendeleev's time. Long-form table displaying two options or composition of group 3 of the periodic table as consisting either of (1, top) the elements Sc, Y, Lu and Lr, or (2, bottom) the elements Sc, Y, La and Ac. The atomic number of each element increases by one, reading from left to right. In the periodic table, elements are categorized into different groups and periods, which aids in the study of the compounds created by those elements. Zn(NO3)2 + NaOH -->. List the member elements by On the discovery of palladium; with observations on other substances found with plantina", "Swedish Contributions to the Discovery of Platinum", https://en.wikipedia.org/w/index.php?title=Group_10_element&oldid=1131458608, Electrical components, due to their predictable changes in, This page was last edited on 4 January 2023, at 07:10. To determine the group, we must first know the following rules: The group number is equal to the number of valence electrons if the element is in the s block.Example: 2,8,2 Mg(12)Valence electrons = group no= 2, If the element belongs to the p block, the group number can be calculated using the formula (number of valence electrons + 10), for a group.Example: Sulfur (16) - 2,8,6Group = no. Inner ring = 2 dots Inner ring = 2 dots Inner ring = 2 dots [17] Although generally unreactive, xenon can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized. The following are the 8 groups of the periodic table: The main group elements of the periodic table are groups 1, 2 and 13 through 18. For the first one we have an organ. Specifically period 4 group 10, Period 4, Group 14 (= IV-A)Germanium, 32Ge, [Ar] 3d10 4s2 4p2 KLMN: (2, 8, 18, 4)Period 4, Group 4 (= IV) Titanium, 22Ti, [Ar] 3d2 4s2 KLMN: (2, 8, 10, 2). Jump to main content . A group is a vertical column down the periodic table, while a period is a horizontal row across the table. Oxidation States of Ions and Atoms. Where is period 5 on the periodic table. Cadmium and its congeners are not always considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. 5 or 6 elements F, Cl, Br, I, At, Uus (possibly), Click on the group number for the Halogen family at the top of the table. Period 3 Sodium Explain that sodium has 11 protons and 11 electrons. If you could witness one event past, present, or future, what would it be? If g is an element of any group and n is some positive integer then the order of an element in a group is given as e=gn. cvs covid test reimbursement form Each BTS member was specifically selected to complete the group which is made of rappers, dancers, and . Zirconium is a chemical element with the symbol Zr and atomic number 40. Adapt of die and that is a fact, And so our bodies must react: The heart speeds up the gut slows down, Facial muscles snarl or flown. Do the Tellurium has no biological role, although fungi can incorporate it in place of sulfur and selenium into amino acids such as tellurocysteine and telluromethionine. ECO 201 - Chapter 2 Thinking like economist part 1 - Sep 9, Philippine Politics and Governance W1 _ Grade 11/12 Modules SY. It found in group 10 and period 5 and a rare and lustrous silvery-white metal discovered by chemist William Hyde Wollaston. Because of its low toxicity, tin-plated metal is also used for food packaging, giving the name to tin cans, which are made mostly of steel. Each new period begins with one valence electron. Based on the organization of the outer shell electrons, a group is a vertical column of the periodic table. Learn more about Palladium at: A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? [12] They are hard, have a high luster, and are highly ductile. Iodine deficiency affects about two billion people and is the leading preventable cause of intellectual disabilities.
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