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Chemistry, 07.01.2020 09:31 id0617045

What is the electron configuration of an element with atomic number 20?

a. 1s^2 2s^2 2p^6 3s^2 3p^5

b. 1s^2 2s^2 2p^6 3s^2 3p^6

c. 1s^2 2s^2 2p^6 3s^2

d. 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

e. 1s^2 2s^2 2p^6

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What is the electron configuration of an element with atomic number 20?

a. 1s^2 2s^2 2p...
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