Nickel is a metallic element, making up
0.008% of the Earth's crust. However, when the deeper core
of the Earth is included, nickel becomes more abundant, and
is the fifth most common element after iron, oxygen, silicon
and magnesium.
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Cobalt is a hard, lustrous, silver-grey
metal, a chemical element with symbol Co. It is found in
various ores, and is used in the preparation of magnetic,
wear-resistant, and high-strength alloys. Its compounds are
used in the production of inks, paints, and varnishes.
More about Cobalt. |
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