To share this content with an AI assistant
102No259
Nobelium
ActinidesBlock fPeriod 7solid at 20 °C
Configuration :[Rn] 5f¹⁴ 7s²
Atomic mass :259 u
French :Nobélium
3D Bohr-model representation of the Nobelium atom (symbol No, atomic number Z=102). Electron shell configuration: 2, 8, 18, 32, 32, 8, 2 electrons.
Scroll to activate 3D
Bohr model · educational
Electron configuration
Full[Rn] 5f¹⁴ 7s²
Short[Rn] 5f¹⁴ 7s²
Valence electrons16
KLMNOPQ shells
K2
L8
M18
N32
O32
P8
Q2
Electronegativity
Pauling1.3
Allen—
Mulliken (eV)—
Atomic radii
Empirical—
Calculated—
Covalent—
Van der Waals—
Successive ionisation energies
I₁641.6 kJ/mol
Electron affinity—
Oxidation states
+2+3
Bold states = most common.