Ga Gallij 31 69.723 13 4 p 31 29.8 2403.0 [Ar] 3d10 4s2 4p1 2 8 18 3 5.9 0.0019% Silver Orthorhombic 1.8 1.756 {"1":"578.8","2":"1979.3","3":"2963","4":"6180"} 579 28.9 126 3 1.41 11.8 5.59 256.06 0.371 40.6 0 Solid, Diamagnetic, Conductor, Metal, Stable, Natural, PoorMetal GAL-i-em Soft, blue-white metal. Used in semiconductor production. It us used in making LEDs (light-emitting diodes) and GaAs laser diodes. Found throughout the crust in minerals like bauxite, germanite and coal. N6ccRvKKwZQ Gallium

Kalcij je poznat još od prvog stoljeća kada su Rimljani pripremali vapno kao kalcijev oksid.

Kalcij je prvi izolirao Sir Humphry Davy 1808. kada je elektrolizom rastavio mješavinu vapna i živinog oksida.

Davy je pokušavao izolirati kalcij; kada je čuo da su Jöns Jakob Berzelius i Pontin pripremili amalgam kalcija uz pomoć elektrolize vapna u živi, i sam je pokušao taj pokus. Od latinske riječi calx, vapno 31 1875 Paul-Emile Lecoq de Boisbaudran France From the Latin word "Gallia" meaning "France" and perhaps also from the Latin word "gallus"

Calcium is considered to be non-toxic

The shell of an egg is made up of primarily calcium carbonate

Calcium is used to remove oxygen, sulfur and carbon from alloys.

It is also used as an alloying agent used in the production of aluminum, beryllium, copper, lead, and magnesium alloys.

Calcium is used as a reducing agent in the extraction of other metals, such as uranium, zirconium, and thorium.

Calcium carbonate is used in manufacturing cement and mortar, lime and limestone.