24
Cr
51.996
Chromium (Cr)
Element 24 · Period 4 · Group 6
transition-metal
solid at room temp
d-block
About Chromium
Hard, lustrous metal. Key component of stainless steel. Used in chrome plating and pigments.
Physical Properties
Atomic Mass
51.996 u
State at 25°C
Solid
Melting Point
1907 °C
Boiling Point
2671 °C
Density
7.19 g/cm³
Magnetism
Antiferromagnetic
Atomic Properties
Electron Configuration
[Ar] 3d⁵ 4s¹
Electron Shells
2, 8, 13, 1
Electronegativity
1.66
Atomic Radius
166 pm
Ionization Energy
653 kJ/mol
Oxidation States
+2, +3, +6
Discovery & History
Discovered By
Louis Nicolas Vauquelin
Discovery Year
1798
Named By
Louis Nicolas Vauquelin
Name origin: Greek: chroma (color)
Frequently Asked Questions
- Is Chromium a metal, nonmetal, or metalloid?
- Chromium is classified as a transition-metal.
- What state is Chromium in at room temperature?
- Chromium is a solid at standard room temperature (25°C).
- What is the atomic mass of Chromium?
- Chromium has an atomic mass of 51.996 atomic mass units (u).
- Who discovered Chromium?
- Chromium was discovered by Louis Nicolas Vauquelin in 1798.
- Where is Chromium on the periodic table?
- Chromium is element number 24, located in period 4 and group 6.