Electronic configuration of calcium is :

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 4 p^{6} 5 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

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1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{5} 4 s^{3}

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1 s^{2} 2 s^{3} 2 p^{5} 3 s^{2} 3 p^{6} 4 s^{2}

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Solution

The correct option is A $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}$
Atomic no. of Ca = 20 and electronic configuration is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}$ .

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Similar questions

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2}

The correct electronic configuration of calcium(Atomic no. - 20) is :

p = 20, n = 20

Why is the electronic configuration of calcium 2,8,8,2 but not 2,8,9,1?

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