WIKIPEDIA
Calcium is the
chemical
element with symbol Ca and atomic
number 20. Calcium is a soft gray alkaline
earth metal, and is the fifth-most-abundant
element by mass in the Earth's
crust.
| Calcium | Ca | Greek/Latin | χάλιξ/calx | χάλιξ means "pebble", and calx means limestone[16] | Latin calx |
From Latin "calx", which means "lime". Calcium was known as early as the first century when the Ancient Romans prepared lime as calcium oxide.
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