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Question

What is the electron configuration of Ca2+ ?


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Solution

Calcium:

  • Calcium is an alkaline earth metal having atomic number 20.
  • The chemical symbol of Calcium is ‘Ca

Electronic configuration: The arrangement of electrons into the orbitals of an atom using some fundamental principle is called its electronic configuration.

Electronic configuration of Ca2+

  • The electronic configuration for Ca is 1s2 2s2 2p6 3s2 3p6 4s2.
  • The calcium atom loses two electrons for the formation of Ca2+.
  • So, two electrons are removed from the 4s orbital for the formation of Ca2+.
  • Hence, the electronic configuration of Ca2+is 1s2 2s2 2p6 3s2 3p6 .

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