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The remainder and the unlisted 54.4478% decay with half-lives less than one year into nonradioactive nuclei. This is before accounting for the effects of any subsequent neutron capture; e.g.:
118 chemical elements have been identified and named officially by IUPAC.A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z).
Examples include cyanogen ((CN) 2), triphosphorus pentanitride (P 3 N 5), disulfur dinitride (S 2 N 2), and tetrasulfur tetranitride (S 4 N 4). The essentially covalent silicon nitride (Si 3 N 4 ) and germanium nitride (Ge 3 N 4 ) are also known: silicon nitride, in particular, would make a promising ceramic if not for the difficulty of working ...