isotope isotope vs. nuclide. a nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus, for example carbon with 6 protons and 7 neutrons. the nuclide concept (referring to individual nuclear species) emphasizes nuclear properties over chemical properties, whereas the isotope concept (grouping all atoms of each element) emphasizes chemical over nuclear.
zinc zinc is a chemical element with the symbol zn and atomic number 30. zinc is a slightly brittle metal at room temperature and has a silverygreyish appearance when oxidation is removed. it is the first element in group (iib) of the periodic table.in some respects, zinc is chemically similar to magnesium both elements exhibit only one normal oxidation state (+2), and the zn 2+ and mg 2+ ions