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It is a silvery, soft metal, in the family of alkaline earth elements, which tarnishes to grayish-white in color after it is exposed to air.

It has a density of 1.55 g/cm3 and is very reactive.

Its atomic number is 20.

Its atomic weight is 40.078.

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10y ago
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13y ago

Calcium is a solid at 20 degrees Celsius

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11y ago

solid

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13y ago

solid

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11y ago

A solid.

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