Question

The given electronic configuration
is incorrect: X= 1s2 2s2 2p5 3s1.

Explain the mistake Keeping in.
mind the Auf Bau principle
and write the correct electronic
configuration.​

Answer 1

Answer:

according to Aug Baus principle the orbital with less energy should be filled first

so by using the magic tree of

1s

2s 2p

3s 3p 3d

4s 4p 4d 4f

etc we get that 2p has less energy than 3s so before filling 3rd orbital we should fill the 2nd orbital completely

so the correct E.C is 1s² 2s² 2p6