Lithium, whose silvery-white colour tarnishes on oxidation when exposed to air, is the most electropositive metal (−3.04 V versus a standard hydrogen electode), the lightest (M = 6.94 g mol −1 ...

Since lithium is the lightest metal and the third-lightest element, after hydrogen and helium ... called soft X-ray emission spectroscopy (SXES), uses X-rays that have longer wavelengths than ...

Suspended in the relic of an ancient sea beneath southern Arkansas, there may be enough lithium for nine times the expected ...