28
Ni
Nickel
Transition metal period 4 group 10 d-block discovered: 1751
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 28
- Atomic mass
- 58.693 a.m.u.
- Electron configuration
- [Ar]4s2 3d8
- Electronegativity
- 1.91 on the Pauling scale
- Atomic radius
- 163 pm
- Ionization energy
- 7.640 eV
- Electron affinity
- 1.156 eV
- Oxidation states
- +3, +2
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 1728 K (1 454,85 °C)
- Boiling point
- 3186 K (2 912,85 °C)
- Density
- 8.912 g/cm³