| Atomic number
| Atomic weight
Calcium (symbol Ca) is a chemical element, atomic number 20 on the periodic table.
Characteristics and historyEdit
Calcium has an atomic mass of 40.08, and was discovered by Humans for the first time in England on Earth's European continent in the year 1808. (ST reference: Star Fleet Medical Reference Manual)
The bones of many humanoid species are composed largely of calcium. (DS9 novel: Devil in the Sky)