Ga แกลเลียม 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

Calcium was known as early as the first century when the Ancient Romans prepared lime as calcium oxide.

Calcium was first isolated by Sir Humphry Davy in 1808 when he electrolyzed a mixture of lime and mercuric oxide.

Davy was trying to isolate calcium; when he heard that Jöns Jakob Berzelius and Pontin prepared calcium amalgam by electrolyzing lime in mercury, he tried it himself. From the Latin word calx, lime 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

เปลือกไข่มีองค์ประกอบหลักเป็นแคลเซียมคาร์บอเนต (หินปูน)

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.