Question

atomic number of calcium is 20. number of valence electron is
3
1
4
2
​

Answer 1

Answer:

2

valence electrons:2

valency:2

2,8,8,2 is the electron configuration

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Answer 2

Answer:Yes the atomic number for Calcium is 20, and the number of Valence Electron is 2.

Explanation:

As you can see in the diagram, there are 2 electrons in the outer energy level and these are the valence electrons.