The chemical symbol for Curium is Cm. The chemical symbol for Lead is Pb. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. For example, the neutron number of uranium-238 is 238-92=146. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. 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. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. It is a soft, silvery-white alkali metal. Chemically, indium is similar to gallium and thallium. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. In nuclear industry gadolinium is commonly used as a neutron absorber due to very high neutron absorbtion cross-section of two isotopes 155Gd and 157Gd. The chemical symbol for Iridium is Ir. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. It is occasionally found in native form as elemental crystals. It is even less abundant than the so-called rare earths. The chemical symbol for Barium is Ba. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. The chemical symbol for Krypton is Kr. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Elemental sulfur is a bright yellow crystalline solid at room temperature. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure.
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