Chromium By Collin Clingerman. Periodic Table Information Chromium Symbol : Cr Atomic Number : 24 Atomic Mass : 51.9961 Period Number : 4 Group Number.

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Presentation transcript:

Chromium By Collin Clingerman

Periodic Table Information Chromium Symbol : Cr Atomic Number : 24 Atomic Mass : Period Number : 4 Group Number : 6

Picture Of Element Chromium

Picture Of Atom Of Element

Physical Properties Melting Point: 2180 [or 1907 °C (3465 °F)] K Boiling Point : 2944 [or 2671 °C (4840 °F)] K Liquid Range : 764 K

Chemical Properties Chromium is unstable in oxygen, it immediately produces a thin oxide layer that is impermeable to oxygen and protects the metal below. It does not tarnish in air, when heated it borns and forms the green chromic oxide.

Uses Of Chromium Magnetic tape (used in audio cassettes and high-class audio tapes) is made from a magnetic compound of chromium. Stainless steel, used in many applications, is made when chromium is added to iron. Some people might use stainless steel knives in the kitchen!

History Of Chromium Chromium was discovered by Louis-Nicholas Vauquelin at 1797 in France. Origin from the Greek word "chroma" meaning "colour", named for the many coloured compounds known for chromium.

Isotopes Chromium has four isotopes which consist of 50Cr, 52Cr, 53Cr, 54Cr.

Interesting Facts Chromium has atomic number 24. It is the first element in Group 6 on the Periodic Table Chromium is a hard, lustrous, steel- gray metal. Stainless Steel is hard and resists corrosion due to the addition of chromium.