Question

Which rule is violated in the electronic configuration 1s02s22p4 ?

Answer 1

Hund's rule is violated in the electronic configuration 1s0 2s2 2p4.

• According to the Hund's rule,all the subshells present in an electronic configuration, have to be occupied by single electron before any kind of double electron occupation by a subshell.

• But,in the given electronic configuration,the 1s subshell is totally omitted and the electron occupation is started from 2s subshell.

• In this way,the Hund's rule is violated in this electronic configuration.

Answer 2

Explanation:

aufbau rule is violated because of the lowest energy orbital filled first but 1s does not complete

first