75 Re 186.207
Rhenium
transition metal
Properties
- Atomic number
- 75
- Atomic mass
- 186.207 u
- Category
- transition metal
- Group
- 7
- Period
- 6
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 2
- Electronegativity
- 1.9 (Pauling)
- Density
- 21.02 g/cm³
- Melting point
- 3185.85 °C
- Boiling point
- 5595.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d⁵
Noble-gas shorthand: [Xe] 4f¹⁴ 5d⁵ 6s²
Electrons per shell: 2, 8, 18, 32, 13, 2 — that's 2 in the outermost shell.
About Rhenium
Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.
- Discovered by Masataka Ogawa
- Named by Walter Noddack
- Appearance: silvery-grayish
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.