Chemical Elements.com - Chromium (Cr)

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Basic Information

Name: Chromium
Symbol: Cr
Atomic Number: 24
Atomic Mass: 51.9961 amu
Melting Point: 1857.0 °C (2130.15 K, 3374.6 °F)
Boiling Point: 2672.0 °C (2945.15 K, 4841.6 °F)
Number of Protons/Electrons: 24
Number of Neutrons: 28
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 7.19 g/cm³
Color: gray

Atomic Structure

Number of Energy Levels: 4

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Isotopes

Isotope	Half Life
Cr-49	42.3 minutes
Cr-50	Stable
Cr-51	27.7 days
Cr-52	Stable
Cr-53	Stable
Cr-54	Stable

Facts

Date of Discovery: 1797
Discoverer: Louis Vauquelin
Name Origin: From the Greek word chrôma (color)
Uses: Stainless steel
Obtained From: Chromite

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