iron

Name iron
Symbol Fe
Atomic Weight 55.845
Atomic Number 26
CAS ID 7439-89-6
Group Number 8
Group Name (none)
Period Number 4
Origin of Name Anglo-Saxon, iron; Latin, ferrum.
Year Discovered Prehistoric.
Discovery Credits Known to ancient civilizations.
Class Metallic
Color Lustrous, metallic, grayish tinge
Standard State Solid at 77 F & 298 K
Description When pure, iron is lustrous, and soft (workable). Most important of all metals, used principally as steel alloys. Rusts in damp air, dissolves in dilute acids.

Diagnostic tests: 
The borax bead test in the oxidizing flame gives yellow to brownish red color while hot and is colorless to yellow when cold. Reducing flame gives a bottle green color.
A magnetic mass is obtained if the mineral is powdered, mixed with soda (Na2CO3), and fused in a reducing flame (Note, cobalt and nickel also yield magnetic masses).
In solution, iron will precipitate as Fe(OH)3 when excess amounts of NH4OH are added.

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