Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and …

Feb 7, 2026 · calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table. It is the most abundant metallic element in the human body and the fifth most …

Calcium was named after the Latin term calx meaning lime, and is a reactive silvery metallic element found in Group 2 of the periodic table. It was first isolated in 1808 in England when Sir Humphry …

Calcium (pronunciation KAL-see-em [2]), represented by the chemical symbol or formula Ca [1], is a soft element belonging to the family of alkali earth metals [3].

Calcium is an important element of the periodic table in biology, and medicine. Learn about calcium compounds, properties and uses, history, fun facts, and more!

Chemical element, Calcium, information from authoritative sources. Look up properties, history, uses, and more.

The chemical element calcium is classed as an alkali earth metal. It was discovered in 1808 by Sir Humphry Davy.

Sep 1, 2024 · Calcium is a chemically reactive metal so it is not found naturally, but it is always found as a compound with other elements. Calcium reacts with water and liberates hydrogen gas plus heat.

Calcium is a chemical element of the periodic table with chemical symbol Ca and atomic number 20 with an atomic weight of 40.0784 u and is classed as alkaline earth metal and is part of group 3 …

Calcium is an alkaline earth metal. The alkaline earth metals make up Group 2 (IIA) of the periodic table, a chart that shows how the elements are related. They include beryllium, magnesium, strontium, …