Periodic Table
96
Cm
247
Curium
Actinoid5f⁷6d¹ (half-filled stability); named after the Curies.
Electronic Configuration
[Rn] 5f⁷ 6d¹ 7s²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f⁷ 6d¹ 7s²
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
32e⁻n=4
25e⁻n=5
9e⁻n=6
2e⁻n=7
Properties
Atomic number
96
Atomic mass
247 u
Category
Actinoid
Block / Group / Period
f · — · 7
Valence electrons
2
Oxidation states
+3
Electronegativity
1.3
Atomic radius
174 pm
Ionization energy
581 kJ/mol
Electron affinity
27 kJ/mol
Melting point
1613 K / 1340 °C
Boiling point
3383 K / 3110 °C
Density
13.51 g/cm³
State at 25 °C
solid
Personal Notes
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