Br Brom 35 79.904 17 4 p 35 -7.2 58.8 [Ar] 4s2 3d10 4p5 2 8 18 7 3.12 0.0003% Red Orthorhombic 3.0 2.685 {"1":"1139.9","2":"2103","3":"3470","4":"4560","5":"5760","6":"8550","7":"9940","8":"18600"} 1140 324.6 114 ±1,+5 1.12 23.5 5.286 14.725 0.226 0.122 0 Liquid, Diamagnetic, Insulator, Halogen, Nonmetal, Stable, Natural BRO-meen Redish-brown liquid. It was once used in large quantities to make a compound that removed lead compound build up in engines burning leaded gasoline. Now it is primarily used in dyes, disinfectants, and photographic chemicals. Occurs in compounds in sea water. Slt3_5upuSs Bromine

1797., Louis Nicolas Vauquelin je dobio uzorke rude krokoita.

1798., Vauquelin je otkrio da može izolirati metalni krom zagrijavanjem njegovog oksida u peći na ugljen, što ga čini otkrivačem tog elementa.

Vauquelin je uspio i detektirati tragove kroma u dragom kamenju, kao što su rubini i smaragdi. Od grčke riječi chroma, boja 35 1826 Antoine-J. Balard France From the Greek word "bromos" meaning "stench"

In larger amounts, chromium can be toxic and carcinogenic

Chromium oxide was used by the Chinese in the Qin dynasty over 2,000 years ago

Chromium is used to harden steel, manufacture stainless steel, and form many useful alloys.

It is mostly used in plating to produce a hard, beautiful surface and to prevent corrosion.

The metal is also widely used as a catalyst.

Chromium compounds are valued as pigments for their vivid green, yellow, red and orange colors.