Lithium (Li)
Atomic #3 Group #1
Soft, silvery-white, lightest alkali metal.

Word
Pronunciation
/ˈlɪθiəm/ (LITH-ee-əm)
Appearance
silvery-white
Chemical properties
Phase at STP
Solid
Melting point
453.65 K (180.50 °C, 356.90 °F)
Boiling point
1603 K (1330 °C, 2426 °F)
Density
0.534 g/cm3 (near room temperature), 0.512 g/cm3 (liquid, melting point)
Atomic Weight
6.94 amu
History and etymology
Etymology
Came from the Greek word λιθoς lithos, meaning stone
Discovered
Johan August Arfwedson (1817)
First isolation
William Thomas Brande (1821)
Isotopes
6Li (stable), 7Li (stable)
Quantum
Electron configuration
1s2 2s1
Orbital diagram
1s[↑↓] 2s[↑]
Quantum numbers of the last electron
n=2, l=0, Ml=0, Ms=+0.5