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KB Term:
Calcium
Sigma KEE - Calcium
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Calcium
Soft grey metallic element belonging to group 2 of the periodic table. Used a reducing agent in the extraction of thorium, zirconium and uranium. Essential element for living organisms.
Relationships
Parents
ElementalSubstance
The
Class
of
PureSubstance
s that cannot be separated into two or more
Substance
s by ordinary chemical (or physical) means. This excludes nuclear reactions.
ElementalSubstance
s are composed of only one kind of atom. Examples: Iron (Fe), copper (Cu), and oxygen (O_2).
ElementalSubstance
s are the simplest
PureSubstance
s.
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