Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. Although neodymium is classed as a rare earth, it is a fairly common element. Only about 5×10−8% of all matter in the universe is europium. The chemical symbol for Lanthanum is La. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. The chemical symbol for Rhenium is Re. Chemically, indium is similar to gallium and thallium. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. Atomic weight (average mass of the atom): 20.1797 4. The chemical symbol for Gadolinium is Gd. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. For example if the input number is 9, its square is 9*9 = 81 and sum of the digits is 9. i.e. Its extreme rarity in the Earth’s crust, comparable to that of platinum. The chemical symbol for Thulium is Tm. Neon: Symbol: Ne: Atomic Number: 10: Atomic Mass: 20.1797 atomic mass units: Number of Protons: 10: Number of Neutrons: 10: Number of Electrons: 10: Melting Point-248.6° C: Boiling Point-246.1° C: Density: 0.901 grams per cubic centimeter: Normal Phase: Gas: … is a rare earth element with a metallic silver luster. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. Uranium is a silvery-white metal in the actinide series of the periodic table. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. It represents the closing of the n=2 shell of electrons. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The chemical symbol for Actinium is Ac. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. Density: 0.0008999 grams per cubic centimeter 5. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Neon boiling point is -246,1 °C. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Classified as a noble gas, Neon is a gas at room temperature. Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. In very small amounts, neon can be found in air, especially in northern parts of the atmosphere of our planet. A. The chemical symbol for Americium is Am. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. The chemical symbol for Copper is Cu. The chemical symbol for Radon is Rn. Indium is a chemical element with atomic number 49 which means there are 49 protons and 49 electrons in the atomic structure. The isotope lithium-7 has a mass of 7.0160 atomic mass units, and the isotope lithium-6 has a mass of 6.0151 atomic mass units. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Chlorine is a yellow-green gas at room temperature. and Gay-Lussac, L.-J. In the periodic table, potassium is one of the alkali metals. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. It has the atomic number 10 in the periodic table and belongs in Group 18, the Noble Gases. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. 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