Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. 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. It is by mass the most common element on Earth, forming much of Earthâs outer and inner core. The chemical symbol for Carbon is C. It is nonmetallic and tetravalentâmaking four electrons available to form covalent chemical bonds. The chemical symbol for Technetium is Tc. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. The chemical symbol for Fermium is Fm. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Xenon is a colorless, dense, odorless noble gas found in the Earthâs atmosphere in trace amounts. However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. The chemical symbol for Nickel is Ni. The atomic mass of potassium is 39.098 atomic mass units. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. Atomic Number â Does it conserve in a nuclear reaction? Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. It is very soft that it can be easily cut with a knife. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. The chemical symbol for Molybdenum is Mo. The chemical symbol for Neon is Ne. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. It was first isolated from potash, the ashes of plants, from which its name derives. The number of electrons in each elementâs electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Zirconium is widely used as a cladding for nuclear reactor fuels. The chemical symbol for Rhenium is Re. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Instead, it is found in various minerals such as sylvite, carnallite, langbeinite, and kainite. The chemical symbol for Bismuth is Bi. The chemical symbol for Dysprosium is Dy. Its boiling point is the lowest among all the elements. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. The K symbol for the element comes from the Latin word “kalium”, which stands for potash. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. It is a soft, silvery-white alkali metal.