Nickel (Ni)
Nickel (Ni, element 28) is a transition metal in group 10, period 4. Atomic mass 58.693, electron configuration [Ar] 3d⁸ 4s², uses and facts.
About Nickel
Nickel is a transition metal with the symbol Ni and atomic number 28. It is a solid at room temperature, and it sits in group 10, period 4 of the periodic table. Nickel was discovered in 1751 by Axel Fredrik Cronstedt.
Nickel key facts
- Atomic number: 28
- Symbol: Ni
- Atomic mass: 58.693 u
- Category: transition metal
- Group: 10
- Period: 4
- State at room temperature: solid
- Electron configuration: [Ar] 3d⁸ 4s²
- Electronegativity (Pauling): 1.91
- Melting point: 1728 K (1454.85 °C)
- Boiling point: 3186 K (2912.85 °C)
- Density: 8.908 g/cm³
- Common oxidation states: −2, −1, 0, +1, +2, +3, +4
Electron configuration
The electron configuration of nickel is [Ar] 3d⁸ 4s². The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells.
Uses of nickel
- Coins
- Stainless steel
- Batteries
Did you know?
The 5-cent US coin called a 'nickel' is actually 75% copper and only 25% nickel.
Other elements in group 10 and neighbours
Frequently asked questions
What is the atomic number of nickel?
The atomic number of nickel is 28, which means every nickel atom has 28 protons.
What is the electron configuration of nickel?
The electron configuration of nickel is [Ar] 3d⁸ 4s².
What group and period is nickel in?
Nickel is a transition metal in group 10, period 4.
What state is nickel at room temperature?
Nickel is a solid at room temperature.
What is nickel used for?
Nickel is used for coins, stainless steel, batteries.