radium

Symbol: Ra
Atomic number: 88
Atomic weight: 226
Group: 2
Group name: Alkaline earth metal
Period: 7
Block: s
CAS ID: 7440-14-4
Shell structure: 2.8.18.32.18.8.2
Electron configuration: [Rn].7s2
State: |standardstate|
Melting point: 973 [or 700 °C (1292 °F)]
Boiling point: 2010 [or 1737 °C (3159 °F)]
Ionization energy/kJ per mol: 509.3
Common oxidation states: 2
Pauling electronegativity: 0.9