Rhenium (Re)
Rhenium
Rhenium (Re) is a transition metal in period 6, group 7. Its relative atomic mass is 186.21 and the molar mass of the atom is 186.21 g/mol.
Atomic number 75
Atomic mass 186.21
Molar mass 186.21 g/mol
Category Transition metal Solid
Properties of rhenium
| Atomic number | 75 |
|---|---|
| Symbol | Re |
| Latin name | Rhenium |
| Relative atomic mass | 186.21 |
| Molar mass | 186.21 g/mol |
| Group, period, block | 7, 6, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Xe] 4f¹⁴ 5d⁵ 6s² |
| Electronegativity (Pauling) | 1.9 |
| Atomic radius | 135 pm |
Electron configuration of rhenium
Electrons per shell
K2L8M18N32O13P2
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁵ 6s²
Noble-gas notation
75 protons · 75 electrons[Xe] 4f¹⁴ 5d⁵ 6s²
Formula and compounds of rhenium
Simple substanceRerheniumMolar mass of Re: 186.21 g/mol
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Frequently asked questions
The relative atomic mass of rhenium is 186.21, so the molar mass of the atom is 186.21 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁵ 6s². Noble-gas notation: [Xe] 4f¹⁴ 5d⁵ 6s².