Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. The chemical symbol for Tantalum is Ta. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. The chemical symbol for Palladium is Pd. The chemical symbol for Oxygen is O. We use cookies to ensure that we give you the best experience on our website. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Its properties are thus intermediate between those of chlorine and iodine. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. The chemical symbol for Zinc is Zn. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. The atomic mass is the mass of an atom. The chemical symbol for Neptunium is Np. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. Atomic Mass Number – Does it conserve in a nuclear reaction? Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. common chemical compounds. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. The chemical symbol for Zinc is Zn. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. The chemical symbol for Thorium is Th. Neptunium metal is silvery and tarnishes when exposed to air. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. The chemical symbol for Curium is Cm. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. If you continue to use this site we will assume that you are happy with it. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. The chemical symbol for Gold is Au. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Mercury is commonly known as quicksilver and was formerly named hydrargyrum. The chemical symbol for Thulium is Tm. We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Carbon is C. The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. What is Atomic Number Density - Definition. The chemical symbol for Erbium is Er. A mole is the choice of unit chemists. Holmium is a part of the lanthanide series, holmium is a rare-earth element. The atomic mass (ma or m) is the mass of an atom. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. The chemical symbol for Ytterbium is Yb. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry.    Crystal Structure, Element Groups: The chemical symbol for Beryllium is Be. Typical densities of various substances are at atmospheric pressure. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. This value on a periodic table is given in atomic mass units or amu, but for chemistry calculations, you usually write atomic mass in terms of grams per mole or g/mol.

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