Element 75

Rhenium (Re)

75

Re

rhenium

Metal · d block · group 7, period 6

Electron configuration: $[\mathrm{Xe}]\,6s^{2}\,4f^{14}\,5d^{5}$
Unpaired electrons: 5 (paramagnetic)
Molar mass: 186.21 g/mol
Electronegativity: 1.9
Atomic radius: 137 pm
First ionization energy: 760 kJ/mol
Next ionization energies: 1,260
Electron affinity: 15 kJ/mol released

Practice

Practice rhenium

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

Where it comes up in the course