_files/cr.jpeg){kind=small}
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
![[Bohr Model of Chromium]](Chemical Elements_com - Chromium (Cr)_files/b0024.gif) |
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