Chromium (Cr) — Transition metal. Atomic number 24.
Steel-gray metal
- Atomic number: 24
- Symbol: Cr
- Atomic mass: 51.996 u
- Category: Transition metal
- State: Solid
- Melting point: 1906.85 °C / 2180 K
- Boiling point: 2670.85 °C / 2944 K
- Density: 7.15 g/cm³ (20°C)
- Electron configuration: [Ar] 3d5 4s1
- Oxidation states: +2, +3, +6
- Electronegativity: 1.66
- Discovered by: Louis Nicolas Vauquelin (1797)
Common uses: Stainless steel, Chrome plating, Pigments
Biological role: Trace amounts may support glucose metabolism.
Frequently Asked Questions about Chromium
What is the atomic number of chromium?
Chromium has an atomic number of 24, meaning each atom contains 24 protons in its nucleus.
What is the atomic mass of chromium?
The standard atomic weight of chromium is 51.996 u (unified atomic mass units).
What category does chromium belong to?
Chromium is classified as a transition metal.
What is the state of chromium at room temperature?
Chromium is a solid at 20 °C (68 °F).
What is the melting point of chromium?
The melting point of chromium is 1906.85 °C / 2180 K.
What is the boiling point of chromium?
The boiling point of chromium is 2670.85 °C / 2944 K.
What is the density of chromium?
The density of chromium is 7.15 g/cm³ (20°C).
What is the electronegativity of chromium?
Chromium has a Pauling electronegativity of 1.66.
What is the electron configuration of chromium?
The electron configuration of chromium is [Ar] 3d5 4s1.
What are the common oxidation states of chromium?
Chromium commonly exhibits the following oxidation states: +2, +3, +6.
When was chromium discovered?
Chromium was discovered in 1797 by Louis Nicolas Vauquelin.
Is chromium radioactive?
Chromium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of chromium?
Trace amounts may support glucose metabolism.
What are the common uses of chromium?
Chromium is used for: Stainless steel; Chrome plating; Pigments.
