Chemical Substance attributes
CAS Registry Number
7440-70-2
Canonical SMILES
[Ca]
DSSTox ID
DTXSID9050484
UNII
SY7Q814VUP
Other attributes
Wikidata ID
Calcium (the chemical symbol is Ca, from Latin. Calcium) is a chemical element of the 2nd group (according to the outdated classification - the second group of the main subgroup, IIA), the fourth period of the periodic system of chemical elements of D. I. Mendeleev, with atomic number 20.
A simple substance, calcium is a moderately hard[3], soft, very light chemically active alkaline earth metal of silver-white color.
It was first obtained in pure form by G. Davy in 1808.
Calcium is one of the vital elements for organisms.
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