Calcium
Videos
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 an
Calcium unter Argon Schutzgasatmosphäre
Calcium crystals stored in mineral oil
One of the 'Ain Ghazal Statues, made from lime plaster
Travertine terraces in Pamukkale, Turkey
Periodic table
Videos
The periodic table, also known as the periodic table of the elements, is an ordered arrangement of the chemical elements into rows and columns. An icon of chemistry, the periodic table is widely used
Calcium
…20Ca Calcium Appearance dull gray, silver; with a pale yellow tint Standard atomic weight Ar°(Ca) 40.078±0.004 40.078±0.004 (abridged) Calcium in the periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium…
Liquid mercury. Its liquid state at standard conditions is the result of relativistic effects.
Graphite and diamond, two allotropes of carbon
Iron, a metal
Sulfur, a nonmetal