Period 2 element two make up all natural occurrence of lithium on Earth, although further isotopes have been synthesized. In ionic compounds, lithium loses an electron to become positively charged, forming the cation Li. Lithium is the first alkali metal in the periodic table, and the first metal of any kind in the periodic table. At standard temperature and pressure, lithium is a soft, silver-white, highly reactive metal. With a density of 0.564 g·cm, lithium is the lightest metal and the least dense solid element. Lithium is one of the few elements synthesized in the Big Bang, making it a primordial element. Lithium
Next-to-Minimal Supersymmetric Standard Model much richer than that of the MSSM. In particular, the Higgs potential is in general no longer invariant under CP transformations; see CP violation. Typically, the Higgs bosons in the NMSSM are denoted in an order with increasing masses; that is, by formula_31, with formula_32 the lightest Higgs boson. In the special case of a CP-conserving Higgs potential we have three CP even Higgs bosons, formula_33, two CP odd ones, formula_34, and a pair of charged Higgs bosons, formula_35. In the MSSM, the lightest Higgs boson is always Standard Model-like, and therefore its production and decays are roughly known. In