To share this content with an AI assistant
98Cf251
Californium
ActinidesBlock fPeriod 7solid at 20 °C
Configuration :[Rn] 5f¹⁰ 7s²
Atomic mass :251 u
3D Bohr-model representation of the Californium atom (symbol Cf, atomic number Z=98). Electron shell configuration: 2, 8, 18, 32, 28, 8, 2 electrons.
Scroll to activate 3D
Bohr model · educational
Electron configuration
Full[Rn] 5f¹⁰ 7s²
Short[Rn] 5f¹⁰ 7s²
Valence electrons12
KLMNOPQ shells
K2
L8
M18
N32
O28
P8
Q2
Electronegativity
Pauling1.3
Allen—
Mulliken (eV)—
Atomic radii
Empirical186 pm
Calculated—
Covalent—
Van der Waals—
Ionic radii (Shannon-Prewitt)
+395 pm
Successive ionisation energies
I₁608 kJ/mol
Electron affinity—
Oxidation states
+2+3+4+5
Bold states = most common.