Kalsium

20 KaliumCalciumSkandium
Mg

Ca

Sr

Skeiðbundna skipanin
Útsjónd

Grátt metal
Alment
Evnafrøðiligt tekn: Ca
Atomnummar: 20
Atommassi: 40,078(4) g/mol
Frumevnisseria: jarðalkalimetal
Bólkur: 2
Perioda: 4
Blokkur: s
Elektronsamanseting: [Ar] 4s²
Elektronir pr. skal: 2, 8, 8, 2
Kovalent radius: 174 pm
Evnafrøðiligir eginleikar
Oxidatiónstrin: 2
Elektronegativitetur: 1,00 (Paulings skala)
Alisfrøðiligir eginleikar
Tilstandsformur: Fastur
Smeltipunkt: 842 °C
Elektriskur resistivitetur: (20 °C) 33,6 nΩ·m
Magnetiskir eginleikar: Paramagnetisk
Mekaniskir eginleikar
Youngs modul: 20 GPa
Forskydningsmodul: 7,4 GPa
Kompressibilitetsmodul: 17 GPa
Poissons forhold: 0,31

Kalsium er eitt frumevni, ið er nummar 20 í skeiðbundnu skipaninini.


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