Question

1s 2s 2p is the above figure is correct? a yes b no

Explanation:

In electron - configuration diagrams, the 1s and 2s orbitals can hold a maximum of 2 electrons with opposite spins, which is shown correctly here. For the 2p orbitals, according to Hund's rule, electrons should first singly occupy each degenerate orbital before pairing up. Here, the 2p orbitals are not filled correctly as electrons should be placed one - by - one in each of the 2p orbitals first instead of pairing up in the first 2p orbital while leaving the others empty.

Answer:

b. No