Transcript of Periodic Table of Elements
The Periodic Table of Elements Hydrogen Helium Oxygen Hydrogen is the first element of the periodic table. It is located in Group 1, Period 1. The atomic number for hydrogen is 1. It is represented by the symbol "H". Hydrogen's element category pertains to non-metal. The natural state for hydrogen is gas and at room temperature it is also a gas. It is commonly found from the Earth and the universe but on the Earth it is found in water. It can be made by "reforming" which is taking carbonized atoms in methane are separated in water.Hydrogen's appearance is a colorless gas with purple glow in its plasma state. It has an average atomic weight of 1.007 94 u. Hydrogen is the lightest and most abundant chemical element, containing approximately 75% of the universe's chemical element mass. Hydrogen (in its plasma state), is composed in non-remnant stars. At a normal temperature, which is, hydrogen is colorless ,odorless, non-metallic, tasteless, non-toxic, and a highly combustible diatomic gas with the molecule formula H2. Helium is the second element in the periodic table. It is located in Group 18, Period 1. The atomic number for helium is 2. It is represented by the symbol "He". Helium's element category pertains to the noble gases. The natural state for helium is gas and as well at room temperature. Its appearance is a colorless gas with a red-orange glow when it is placed in a high voltage electric field. Helium can't really be made. Although one way in "making" helium is by taking the natural radioactive decay of the elements in the Earth's crust. .Helium has an atomic weight of 4.002602 u. It is the second lightest element and is the second most abundant element observable in the universe. Helium approximately has 24% total elemental mass; this is equivalent to 12 times the mass of all the heavier elements combined! Silver is the forty-seventh element in the periodic table. It is located in Group 11, Period 5. The atomic number for silver is 47. Silver is represented by the symbol "Ag". Its appearance is a lustrous white metal. Silver's natural state is solid and its element category is transition metal. Its density is 10.49 g cm-3, and its liquid density at m.p. is 9.320 g cm-3. Today , silver is a very precious metal. It can be used to make jewelery, ornaments for the Christmas Tree, silverware (forks, spoons, etc...). Silver is produced by copper, gold, lead, and zinc refining. Silver's standard atomic weight is 107.8682 u. The state of silver at room temperature is a metal. Silver is commonly found in Argentina. Silver is naturally mined not made. It gets melted and poured into molds to make certain objects. This is a picture of hydrogen in its plasma state This is a picture of balloons, they are usually filled with helium. Oxygen is the eighth element in the periodic table. It is located in Group 16, Period 2. The atomic number for oxygen is 8. It is represented by the symbol "O". (The word oxygen comes from the Greek origin/language. "Oxys" in Greek meaning "acid", "sharp", referring to the sour taste of acids) and "genes" in Greek meaning "producer", "begetter". Oxygen's element category is non-metal, chalcogen. The natural state for Oxygen is gas. It's appearance is a colorless gas. At standard temperature and pressure, two atoms of the element bind to form dioxygen. Dioxygen is a very pale blue, odorless, tasteless diatomic gas with the formula "O2". Oxygen is a gas at room temperature, Oxygen's standard weight is 15.9994(3) u. Its density is (0°C, 101.325 kPa) 1.429 g/L, its liquid density at b.p. is 1.141 gcm -3. Diatomic oxygen gas contains 20.8% of the volume of the air. About 2.5 billion years ago, O2 started to gain in the atmosphere after the evolutionary appearance of the organisms. Oxygen is commonly found on Earth. Oxygen is made by algae and plants and humans also help as well. Trees give us oxygen for us humans to breathe but in order to reproduce the oxygen, as we exhale/breathe out, the carbon-dioxide is taken in by trees. Silver By Jordan Poon and Simon Lin Calcium Calcium is the twentieth element in the periodic table. It is located in Group 2, Period 4. The atomic number for calcium is 20. Calcium is represented by the symbol "Ca". Calcium has an atomic mass of 40.078 amu. It is a soft, gray alkaline earth metal. It is fifth and most abundant element (by mass) in the Earth's crust. Its appearance is a dull gray, silver. Its density is 1.55g cm-3. Calcium metal reacts with water. The hydrogen gas evolves at a rapid rate to be noticeable. Everyday people around the world take their daily amount of calcium by drinking milk or o other milk products or by taking a vitamin containing calcium. It is a solid at room temperature. Calcium is a natural element so you can't make it but it can be refined by an electrolytic process which is similarly used for aluminum and magnesium. Tin Tin is the fiftieth element of the periodic table. It is located in Group 14, Period 5. The atomic number for tin is 50. Tin is represented by the symbol "Sn". Its natural state is solid and its element category is post-transition metal. Tin's standard atomic weight is 118.710 amu. Its density is 7.365 g cm-3 (white). Its density is 5.769 g cm-3 (gray). Tin can either appear as gray or silvery. Tin is used more often in the modern times. They are used in many alloys that 60% or more tin. Tin can be found in Malaysia, Bolivia, Indonesia, Thailand, and Nigeria. Tin is produced by reducing ore with carbon in a reverberatory furnace where the material is heated in directly of a flame. Titanium Titanium has a Ti symbol and the atomic number 22. It has a low density and is a strong, lustrous, corrosion-resistant (including sea water and chlorine) transition metal with a silver colour. At room temperature, it is a solid. It occurs within a number of mineral deposits and is found in almost all living things, rocks, water bodies, and soils. It's the most common compound and its natural state is a solid with a density of 4.506 g/cm³. Also, it is classified as a transition metal. Xenon Krypton Krypton has a Kr symbol and the atomic number 36. It's odourless and tasteless and is a noble gas. Krypton occurs in trace amounts in the atmosphere and can be used in lighting and photography. At room temperature, it is a gas. It's high light output in plasmas allows it to play an important role in many high-powered gas lasers (krypton ion and excimer lasers), which pick out one of the many spectral lines to amplify. Its natural state is a gas with a density of 3.749 g/L. Boron Boron has a B symbol and the atomic number 5. Its natural state is a solid and is classified as a metalloid with a density of 2.34 g/cm³. It is produced entirely by cosmic ray spallation and can't naturally be found chemically un-combined on Earth. At room temperature, it is a solid. Also, it is a low-abundance element in both the solar system and the Earth's crust. Gallium Gallium has a Ga symbol and the atomic number 31. Full transcript
It is a soft silvery metallic poor post transition metal with density of 5.91 g•cm−3. At room temperature it is a solid. Also,it liquefies slightly above room temperature, it will melt in the hand. From discovery in 1875 to the semiconductor era, its primary uses were in high-temperature thermometric applications and in preparation of metal alloys with unusual properties of stability, or ease of melting. In Bioglogy, this solid is not essential to be known. Scandium Scandium has a Sc symbol and the atomic number 21. It is a silvery-white metallic transition metal, and has historically been sometimes classified as a rare earth element. It's present in most of the deposits of rare earth and uranium compounds, but it is extracted from these ores in only a few mines worldwide.At room temperature it is a solid. When oxidized by air, it develops a slightly yellowish or pinkish cast. Also, its natural state is a solid and at room temperature it is a solid with a density of 2.985 g/cm³ Radium Xenon has a Xe symbol and the atomic number 54. Xenon is a colorless, heavy, odourless noble gas; it occurs in the Earth's atmosphere in trace amounts. At room temperature it is a gas. It can undergo a few chemical reactions such as the formation of xenon hexafluoroplatinate, the first noble gas compound to be synthesized. It is non toxic but its compounds are highly toxic due to their oxidizing characteristics. Its natural state is a gas and has a density of 5.894 g/L Radium has a Ra symbol and the atomic number 18. It's an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air and becomes black in color. Its found in uranium ores in trace amounts as small as a seventh of a gram per ton of uraninite in nature.Today, it is produced by the decay of heavier elements, being present in decay chains. Its natural state is solid with a density of 5.5 g•cm−3 and at room temperature it is a solid. This is a picture of an oxygen molecule. This is a picture of calcium in its mined form. This is a picture of silver in its refined form. This is a picture of tin in its refined form. Iodine Iodine is the fifty-third element in the periodic table. It is located in Group 17, Period 5. The atomic number for iodine is 53. It is represented by the symbol "I". Iodine's natural state is a halogen and its element category is also halogen. Iodine's standard atomic weight is 126.90447. Iodine's density is 4.933 g cm-3. Its appearance has a lustrous metallic gray. It is also a violent gas. Iodine can be found in Chile, Japan and the U.S.A. It can be produced from pure brine (a solution of salt) and purified with sulfuric acid, then gets oxidized with chlorine. This is a picture of iodine. Gold Gold is the seventy-ninth element in the periodic table. It is located in Group 11, Period 6. The atomic number for gold is 79. Gold is represented by the symbol "Au". Gold's natural state is solid at room temperature and its element category is transition metal. Gold's atomic weight is 196.966569(4) amu. It has a density of 19.30 g cm-3 and a liquid density of 17.31g cm-3. Gold is dense, soft, and shiny. It is one of the least reactive chemical solid elements. Gold can be used to make coins and jewelery. It can be found in South Africa, Canada, China, and in the U.S. Gold occurs naturally. This is a picture of gold bars.