Lithium
Videos
Lithium is a chemical element; it has symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the least dense metal and the least dense solid element.
Lithium ingots with a thin layer of black nitride tarnish
Lithium floating in oil
Nova Centauri 2013, a stellar nova from which lithium was detected
Johan August Arfwedson is credited with the discovery of lithium in 1817.
Beryllium
Videos
Beryllium is a chemical element; it has symbol Be and atomic number 4. It is a steel-gray, hard, strong, lightweight and brittle alkaline earth metal. It is a divalent element that occurs naturally on
Lithium
…Both natural isotopes have anomalously low nuclear binding energy per nucleon (compared to the neighboring elements on the periodic table, helium and beryllium); lithium is the only low numbered element that can produce net energy through nuclear fission. The two lithium nuclei have lower binding energies per…
Be 140g
Beryllium ore with a U.S. penny for scale
Emerald is a naturally occurring compound of beryllium.
A bead of beryllium from a melt