Cobalt

Atomic Number- 27 Atomic Mass-58.933195 26 isotopes Group: Metals

Discovered by George Brandt in 1739. He was a Swedish chemist who was trying to prove that the ability of certain minerals to color gas blue was due to the element of Cobalt and not to the element called bismuth, which is what many people thought then.

Word origin: German kobald: evil spirits or goblin or Greek cobalos: mine

It got its chemical symbol by taking the first two letters of Cobalt

Cobalt carbonyl-C8Co2O8 O-amyl phenol-HCo(CO)4 Cobalt metal dust-Co Lead Nitrate-Pb(NO2)2

Physical properties of Cobalt The melting point of cobalt is 1,495 degrees

Celsius The boiling point is 2,927 degrees Celsius. The number of protons is 27, the number of

electrons is 27, and the number of neutrons is 32.

The density of Cobalt is 8.9g/cc

Common uses of Cobalt Cobalt is used in making jet engines and

gas turbine parts because Cobalt is extremely resistant to corrosion and damage even at really high temperatures

When Cobalt is combined with Chromium and tungsten it is used in making high speed cutting tools

Cobalt is also used in making strong, permanent magnets

Where its found in nature: Cobalt is only found in nature when it is in

the chemically combined form. Cobalt is found in the minerals cobaltite, erythrite, and smaltite. It is commonly associated with ores of iron, nickel, silver, lead, and copper. Cobalt is also found in meteorites.

Commonly found: Cobalt is found in rocks, soil, water and

even in animals. Currently cobalt is not mined in the U.S. and is imported and recycled from metal. It is naturally made. Cobalt is found in the Earth’s core, but there is a very small abundance.

State of Matter Cobalt is a solid. It is a metal that is found in

the 9th group and the 4th period.

Chemical properties of Cobalt Cobalt is very, very flammable. It aggressively reacts with plain air. If

exposed, it will catch fire easily. Bromine and Cobalt react through direct

touch and form dibromide cobalt(II) bromide- CoBr2

Cobalt doesn’t really react with nitrogen, water, and dissolves slowly in dilute sulphuric acid.