Which of the following electronic configurations is not possible: Li-3: 1s2 2s1 N-7: 1s2 2s2 2p3...

Question

Question

Which of the following electronic configurations is not possible:

Li-3: 1s2 2s1

N-7: 1s2 2s2 2p3

Ne-10: 1s2 2p6 3s2

K-19: 1s2 2s2 2p6 3s2 3p6 4s1

All of the above configurations are possible.

Answer 1

Answer #1

Configuration of neon is not possible.

It is

1s2, 2s2, 2p6

Given configuration contradict pauli rule.

Answer 2

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