Chromium
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: 2
Second Energy Level: 8
Third Energy Level: 13
Fourth Energy Level: 1
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
Odd Facts
- The state of California currently has 9 different bills on chromium
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