The chemical symbol for Uranium is U. Atomic Mass: 14.007 atomic mass units Number of Protons: 7: Number of Neutrons: 7: Number of Electrons: 7: Melting Point-209.9° C: Boiling Point-195.8° C: Density: 1.2506 grams per cubic centimeter: Normal Phase: Gas: Family: Nonmetal : Period: 2: Cost: 4 cents per 100 grams . The chemical symbol for Germanium is Ge. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. The chemical symbol for Nitrogen is N. Mass numbers of typical isotopes of Nitrogen are 14; 15. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. 1) You may use almost everything for non-commercial and educational use. The chemical symbol for Barium is Ba. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. 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. Gold is a transition metal and a group 11 element. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. If you continue to use this site we will assume that you are happy with it. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Atomic mass of Nitrogen is 14.0067 u.Â. The chemical symbol for Osmium is Os. The chemical symbol for Phosphorus is P. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Because of its high chemical reactivity, barium is never found in nature as a free element. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. 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. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. The chemical symbol for Americium is Am. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Uranium has the highest atomic weight of the primordially occurring elements. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. The chemical symbol for Mendelevium is Md. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. In the periodic table, potassium is one of the alkali metals. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. The excess neutrons act somewhat like nuclear glue. Only two stable nuclides have fewer neutrons than protons: hydrogen-1 and helium-3. Fourteen radioisotopes are also known, with atomic masses ranging from 10 to 25, along with one nuclear isomer, N. All of these radioisotopes are short-lived, the longest-lived being nitrogen-13 with a half-life of 9.965 minutes. The chemical symbol for Zirconium is Zr. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772. The chemical symbol for Astatine is At. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. The atomic mass is the mass of an atom. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. Atomic mass. These extra neutrons are necessary for stability of the heavier nuclei. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Ammonia is important for making substances like fertilizers, protective shielding in welding applications, refrigeration and explosives.