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How many valence electrons does calcium have?

Author:
February 20th, 2023

Calcium has 2 .
Calcium has 20 electrons so they are arranged 2. 8. 8. 2
Using orbital notation the electron structure is:
##1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)##
You can see that there are 2 electrons in the outer energy level and these are the .

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