- Atomic Mass: 226.0254
- Electronegativity:
- Pauling: 0.89
- Allred: 0.97
- Polarizability: 38.3 Å3
- Effective Nuclear Charge:
- Radius:
- Ra 2 +: 152 pm
- Atomic: 223 pm
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- Successive Ionization Energies:
- Ra -› Ra + : 509.3 kJ mol-1
- Ra+1 -› Ra+2 : 979 kJ mol-1
- Ra+2 -› Ra+3 : (3300) kJ mol-1
- Ra+3 -› Ra+4 : (4400) kJ mol-1
- Ra+4 -› Ra+5 : (5700) kJ mol-1
- Ra+5 -› Ra+6 : (7300) kJ mol-1
- Ra+6 -› Ra+7 : (8600) kJ mol-1
- Ra+7 -› Ra+8 : (9900) kJ mol-1
- Ra+8 -› Ra+9 : (13500) kJ mol-1
- Ra+9 -› Ra+10 : (15100) kJ mol-1
- Common Ions : Ra 2 +
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