5
226
[Rn] 7s2
226Ra
2
7
s
88
2, 8, 18, 32, 18, 8, 2
509.29
Ra
5
696°C, 1285°F, 969 K
1500°C, 2732°F, 1773 K
Pierre and Marie Curie
1898
7440-14-4
4886483
More Information
expand all +
collapse all -

Atomic Data

Atomic Radiues, Non-bonded (A): 2.83
Electron Affinity (kJ mol-1): 9.65
Covalent Radiues (A): 2.11
Electronegativity (Pauling Scale): 0.9
Ionisation Energies (kJ mol-1) 1st 2nd 3rd 4th 5th 6th 7th 8th
509.29 979.051 - - - - - -

Oxidation States and Isotopes

Common oxidation states 1
Isotope Atomic Mass Natural Abundance Half Life Mode of Decay
223Ra 223.019 - 11.43 d α
223Ra 224.020 - 3.66 d α
223Ra 226.025 - 1599 y α
> 4 x 1018 y sf
223Ra 228.031 - 5.76 y β-
βf

Supply Risk

Relative Supply Risk: Unknown
Crustal Abundance (ppm): 0.0000009
Recycle Rate (%): Unknown
Production Conc.(%) : Unknown
Top 3 Producers:
Unknown
Top 3 Reserve Holders:
Unknown
Substitutability: Unknown
Political Stability of Top Producer: Unknown
Political Stability of Top Reserve Holder: Unknown

Pressure and Temperature Data

Specific Heat Capacity: Unknown
Shear Modulus: Unknown
Young Modulus: Unknown
Bulk Modulus: Unknown
Pressure 400k Pressure 600k Pressure 800k Pressure 1000k Pressure 1200k Pressure 1400k Pressure 1600k Pressure 1800k Pressure 2000k Pressure 2200k Pressure 2400k
- - - - - - - - - - Unknown