78
Pt
Platinum
Transition metal period 6 group 10 d-block discovered: 1735
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 78
- Atomic mass
- 195.08 a.m.u.
- Electron configuration
- [Xe]6s1 4f14 5d9
- Electronegativity
- 2.28 on the Pauling scale
- Atomic radius
- 209 pm
- Ionization energy
- 9 eV
- Electron affinity
- 2.128 eV
- Oxidation states
- +4, +2
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 2041.55 K (1 768,4 °C)
- Boiling point
- 4098 K (3 824,85 °C)
- Density
- 21.46 g/cm³