Chromium

Statistics:

• Name: Chromium
• Symbol: Cr
• Classification: Transition Metal
• Atomic Number: 24
• Atomic Mass: 51.9961 g/mol
• Density: 7.14 g/cm³
• Melting: 1857°C
• Boiling: 2482°C
• Protons & Electrons:24
• Neutrons:28
• Discovered: 1797
• Discovered By: Vauquelin
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 13
• Level 4: 1

Isotopes:

Isotope: Half-life

• ⁴⁹Cr: 42.3 minutes
• ⁵⁰Cr: 1.8e+17 years
• ⁵¹Cr: 27.7025 days
• ⁵²Cr: stable
• ⁵³Cr: stable
• ⁵⁴Cr: stable

Brief Summary

Chromium is a Transition Metal with the symbol 'Cr' and contains 24 Protons & Electrons with 28 neutrons in the nucleus of the atom. Chromium has an atomic mass of 51.9961 g/mol and, at a temperature of 20°C, has a density of 7.14 g/cm³. It will melt at a temperature of 1857°C and boil at 2482°C.

Chromium was discovered by Vauquelin in 1797 and is named 'Chromium' Greek word "chrôma" meaning "color".

Some common usages for Chromium: to create stainless steel.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Chromium :: Cr :: 24 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/chromium.html>.