Category
actinide
State at Room Temperature
solid
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁷ 6d¹
Valence Electrons
2
Lewis Dot:••
Electronegativity
1.28
Pauling scale
Oxidation States
+3+4
Melting Point
1613 K
1339.85°C
Boiling Point
3383 K
3109.85°C
Density
13.51
g/cm³
Position in Table
Group Period 7f-block
Discovery
Historical Information
Discovered byGlenn T. Seaborg, Ralph A. James, Albert Ghiorso
Year1944
Common Uses
Applications & Industries
Thermoelectric generators, alpha particle sources, research
Related Elements
Same group or period
Related Calculators
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