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Cobalt

Cobalt

Element with the atomic number of 27

Cobalt (chemical symbol - Co, from Lat. Cobalt) is a chemical element of the 9th group (according to the outdated classification - the eighth group of the secondary subgroup, VIIIB), the fourth period of the periodic system of chemical elements of D. I. Mendeleev, with atomic number 27.

A simple substance, cobalt is a silvery-white, slightly yellowish transition metal with a pinkish or bluish tint. It exists in two crystal modifications: α-Co with a hexagonal densely packed lattice, β-Co with a cubic face-centered lattice, the transition temperature αββ is 427 °C.

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Dave Roos
August 28, 2019
HowStuffWorks
Cobalt is associated with the color blue, but it's so needed for rechargeable batteries that the U.S. put it on the list of minerals it can't live without.
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