Element Nr. 20

Calcium

alkaline earth solid Entdeckt 1808

40.078 Atomgewicht (u)

842 °C Schmelzpunkt

1484 °C Siedepunkt

1.55 g/cm3 Dichte

1 Elektronegativität

[Ar] 4s2 Elektronenkonfiguration

4 Periode

2 Gruppe

📖 Über Calcium

The fifth most abundant element in Earth's crust and essential for bones, teeth, and cellular signaling. Calcium carbonate (limestone) is one of the most important geological materials, forming the shells of marine organisms over millions of years and eventually becoming chalk, limestone, and marble.

🔧 Verwendungen und Anwendungen

Bone and teeth structure (hydroxyapatite)
Cement and concrete (calcium silicates)
Antacids (calcium carbonate)
Calcium supplements
Steel production (removing impurities)

💡 Wusstest du?

Fakt: The White Cliffs of Dover are made almost entirely of calcium carbonate from the compressed shells of microscopic marine organisms called coccoliths that lived in a warm shallow sea about 70-100 million years ago.