78 Pt 195.085
Platinum
transition metal
Properties
- Atomic number
- 78
- Atomic mass
- 195.085 u
- Category
- transition metal
- Group
- 10
- Period
- 6
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 1
- Electronegativity
- 2.28 (Pauling)
- Density
- 21.45 g/cm³
- Melting point
- 1768.25 °C
- Boiling point
- 3824.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s¹ 4f¹⁴ 5d⁹
Noble-gas shorthand: [Xe] 4f¹⁴ 5d⁹ 6s¹
Electrons per shell: 2, 8, 18, 32, 17, 1 — that's 1 in the outermost shell.
About Platinum
Platinum is a chemical element with symbol Pt and atomic number 78. It is a dense, malleable, ductile, highly unreactive, precious, gray-white transition metal. Its name is derived from the Spanish term platina, which is literally translated into "little silver".
- Discovered by Antonio de Ulloa
- Appearance: silvery white
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.