Question

Which one of the following follows the correct order of energy
a)1s<2s>2p<3s<3p<4s b)1s<2s<2p<3p<3s<4s c) 1s<2s<2p<3s<3p<4s d) 1s<2s<2p>3s<3p<4s

Answer 1

Answer:

first c then a then b

Explanation:

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