Calcium (Ca) Properties and Facts

Element 20 - Alkaline Earth Metal

What are the basic properties of Calcium?

Calcium (symbol: Ca) is a alkaline earth metal with atomic number 20. Its atomic mass is 40.078 u, and it belongs to period 4 and group 2.

What is the electron configuration of Calcium?

The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

What are the physical properties of Calcium?

Melting point: 1115.0 K
Boiling point: 1757.0 K
Density: 1.55 g/cm³

What are the known isotopes of Calcium?

  • Ca-40: 96.941% abundance
  • Ca-42: 0.647% abundance
  • Ca-43: 0.135% abundance
  • Ca-44: 2.086% abundance
  • Ca-46: 0.004% abundance

What is the biological role and occurrence of Calcium?

Biological role: Essential for bone structure and muscle function
Natural occurrence: Found in limestone, gypsum, and other minerals

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