Kalsiyum bir alkali metal değildir.
- Calcium is not an alkali metal.
Berilyum, magnezyum, kalsiyum, stronsiyum, baryum ve radyum toprak alkali metalleridir.
- Beryllium, magnesium, calcium, strontium, barium and radium are alkaline earth metals.
... Their shells, made of calcium and carbon, ...
... the hospitals fixed interest on the hillside deposit calcium oxides to cover ...