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
Standard conditions for temperature and pressure below: Technical literature can be confusing because many authors fail to explain whether they are using the ideal gas constant "R", or the specific gas constant "R". The relationship between the two constants is "R" = "R" / "m", where "m" is the molecular mass of the gas. The US Standard Atmosphere (USSA) uses 8.31432 m·Pa/(mol·K) as the value of "R". However, the USSA,1976 does recognize that this value is not consistent with the values of the Avogadro constant and the Boltzmann constant. Standard conditions for temperature and pressure Standard conditions for temperature and pressure are standard sets of conditions