Element #24 Chromium

cr

The element chromium was first discovered in 1797, by Louis Nicolas Vauquelin. The name "chromium" comes from the Greek word "chroma", which means color.

Properties of Chromium

Chromium is a solid at room temperature. The melting/ freezing point of chromium is 1907° C, or 3465° F. The boiling point of chromium is 2671° C, or 4840° F. Chromium is mainly used to plate steel and to make alloys. Usually when used for plating it is polished to a high shine and is very reflective.
Chromium has an electronegativity of 1.66. The first, second, and third ionization energies are 652.9 Kj/mol, 1590.6 Kj/mol, and 2987.0 Kj/mol, respectively.

Chromium Reactions

Chromium does not react with the air or the oxygen in the air, which is why it is such a popular plating and alloy for steel.

Chromium does react with 6 Molar hydrochloric acid.

Chromium does not react with 15 Molar nitric acid

Chromium reacts with 6 Molar Sodium hydroxide.