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Information valid for Cr-52 unless otherwise noted

Basic Information

Symbol: Cr
Atomic Number: 24
Mass: 51.9961
Melting Point: 1857.0 C
Boiling Point: 2672.0 C
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

[Bohr Model of Chromium]
Number of Energy Levels: 4

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 13
    Fourth Energy Level: 1


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


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