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The number of protons in an atom’s nucleus determines the chemical properties of that atom. The protons are positively charged and reside in the center or nucleus of the atom. Neutrons are uncharged and surround the protons in the nucleus of an atom. The total number of protons and neutrons in an atom is called the atomic number or symbol (N): N + Z = A.
Element 116, which is synthetic and has only been created in the laboratory, is a radioactive metal that’s been found to have four known isotopes with short half-lives. Its most stable isotope has a mass of 293. The chemical properties of livermorium are similar to those of its closest neighbor, polonium.
Scientists at Russia’s Joint Institute for Nuclear Research in Dubna worked with researchers from the Lawrence Livermore National Laboratory in California to synthesize element 116, which they first announced in 2000 as “eka-polonium” or ununhexium (Uuh) before being formally named livermorium by the IUPAC in 2012.
As the seventh element of Period 7, livermorium is expected to behave in similar ways to its nearest neighbor, polonium. It’s also expected to be a solid at room temperature, like most of the other members of Group 16 of the periodic table.