2858.693NiNickel
Nickel (Ni) — element 28transition metal · group 10, period 4
Nickel is a chemical element with the symbol Ni and atomic number 28. It is a transition metal in group 10, period 4 of the periodic table (the d-block), with a standard atomic mass of 58.693 u. At room temperature (25 °C) nickel is a solid.
💡 Known for: A corrosion-resistant metal used in stainless steel, rechargeable batteries and coins.
# Nickel properties
| Symbol | Ni |
|---|---|
| Atomic number | 28 |
| Atomic mass | 58.693 u |
| Category | transition metal |
| Group | 10 |
| Period | 4 |
| Block | d-block |
| Electron configuration | [Ar] 3d⁸ 4s² |
| Full configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s² |
| Electrons per shell | 2, 8, 16, 2 |
| Protons / electrons | 28 / 28 |
| State at 25 °C | solid |
| Melting point | 1728 K (1454.8 °C, 2650.7 °F) |
| Boiling point | 3186 K (2912.8 °C, 5275.1 °F) |
| Density | 8.912 g/cm³ |
| Electronegativity (Pauling) | 1.91 |
| First ionization energy | 7.64 eV |
| Atomic radius | 149 pm |
| Discovered | 1751 |
# Electron configuration of nickel
The electron configuration of nickel is [Ar] 3d⁸ 4s², written out in full as 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s². Its 28 electrons fill 4 shells as 2, 8, 16, 2, so the outermost shell holds 2 electrons.
# Related elements
CoCobaltprevious elementCuCoppernext elementPdPalladiumgroup 10PtPlatinumgroup 10DsDarmstadtiumgroup 10ScScandiumtransition metalTiTitaniumtransition metalVVanadiumtransition metalCrChromiumtransition metalMnManganesetransition metalFeIrontransition metalZnZinctransition metalYYttriumtransition metal
# Nickel FAQ
What is the atomic number of nickel?
The atomic number of nickel is 28: every nickel atom has 28 protons in its nucleus. Its symbol is Ni.
What is the atomic mass of nickel?
The standard atomic mass of nickel is 58.693 u.
What is the electron configuration of nickel?
Nickel's electron configuration is [Ar] 3d⁸ 4s² (1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁸ 4s²), with 2, 8, 16, 2 electrons per shell.
Is nickel a metal?
Yes. Nickel is a transition metal, one of the metals.
What is the melting point of nickel?
Nickel melts at 1728 K (1454.8 °C, 2650.7 °F) and boils at 3186 K (2912.8 °C, 5275.1 °F).
What is nickel used for / known for?
A corrosion-resistant metal used in stainless steel, rechargeable batteries and coins.