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, which is 1 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
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
Platinum: frequently asked questions
- What is Platinum?
- Platinum (Pt) is the chemical element with atomic number 78. It is a metal: specifically a transition metal.
- What is the atomic number of Platinum?
- Platinum's atomic number is 78, which means every Platinum atom has 78 protons in its nucleus.
- What is the electron configuration of Platinum?
- The electron configuration of Platinum is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s1 4f14 5d9 (noble-gas shorthand: [Xe] 4f14 5d9 6s1). Its electrons are arranged in shells of 2, 8, 18, 32, 17, 1, with 1 in the outermost shell.
- Is Platinum a metal or a nonmetal?
- Platinum is a metal: specifically a transition metal.
- What group and period is Platinum in?
- Platinum is in group 10 and period 6 of the periodic table.
- Is Platinum a solid, liquid, or gas?
- At room temperature, Platinum is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.