Element 76

Osmium (Os)

76

Os

osmium

Metal · d block · group 8, period 6

Electron configuration: $[\mathrm{Xe}]\,6s^{2}\,4f^{14}\,5d^{6}$
Unpaired electrons: 4 (paramagnetic)
Molar mass: 190.23 g/mol
Electronegativity: 2.2
Atomic radius: 135 pm
First ionization energy: 840 kJ/mol
Next ionization energies: 1,600
Electron affinity: 106 kJ/mol released

Practice

Practice osmium

No course questions are about osmium specifically, but these lessons cover what you need.

Where it comes up in the course