Nickel (Ni) — Transition metal. Atomic number 28.
Silvery-white metal
- Atomic number: 28
- Symbol: Ni
- Atomic mass: 58.693 u
- Category: Transition metal
- State: Solid
- Melting point: 1454.85 °C / 1728 K
- Boiling point: 2912.85 °C / 3186 K
- Density: 8.91 g/cm³ (20°C)
- Electron configuration: [Ar] 3d8 4s2
- Oxidation states: +2, +3
- Electronegativity: 1.91
- Discovered by: Axel Fredrik Cronstedt (1751)
Common uses: Coins, Stainless steel, Batteries, Catalysts
Biological role: Possible trace biological role.
Frequently Asked Questions about Nickel
What is the atomic number of nickel?
Nickel has an atomic number of 28, meaning each atom contains 28 protons in its nucleus.
What is the atomic mass of nickel?
The standard atomic weight of nickel is 58.693 u (unified atomic mass units).
What category does nickel belong to?
Nickel is classified as a transition metal.
What is the state of nickel at room temperature?
Nickel is a solid at 20 °C (68 °F).
What is the melting point of nickel?
The melting point of nickel is 1454.85 °C / 1728 K.
What is the boiling point of nickel?
The boiling point of nickel is 2912.85 °C / 3186 K.
What is the density of nickel?
The density of nickel is 8.91 g/cm³ (20°C).
What is the electronegativity of nickel?
Nickel has a Pauling electronegativity of 1.91.
What is the electron configuration of nickel?
The electron configuration of nickel is [Ar] 3d8 4s2.
What are the common oxidation states of nickel?
Nickel commonly exhibits the following oxidation states: +2, +3.
When was nickel discovered?
Nickel was discovered in 1751 by Axel Fredrik Cronstedt.
Is nickel radioactive?
Nickel is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of nickel?
Possible trace biological role.
What are the common uses of nickel?
Nickel is used for: Coins; Stainless steel; Batteries; Catalysts.
