Q. 35.0( 1 Vote )

# Pick out the wrong ones from the subshell electronic configurations given below.

a) 1s^{2} 2s^{2} 2p^{7}

b) 1s^{2} 2s^{2} 2p^{2}

c) 1s^{2} 2s^{2} 2p^{5} 3s^{1}

d) 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} 4s^{1}

e) 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} 4s^{2}

Answer :

The wrong electronic configurations are a), c), d).

In a) 1s^{2} 2s^{2} 2p^{7}, p subshell can have a maximum of only 6 electrons.

In c) 1s^{2} 2s^{2} 2p^{5} 3s^{1}__, According to Aufbau rule electrons will be filled first in that subshell which has less energy and when less energy subshell will become full filled then after this next subshell will be filled.__

In d) 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} 4s^{1}, here 4s subshell will be full filled first and after this 3d subshell will fill because 4s subshell has less energy than 3d subshell.

Rate this question :

Pick out the wrong ones from the subshell electronic configurations given below.

a) 1s^{2} 2s^{2} 2p^{7}

b) 1s^{2} 2s^{2} 2p^{2}

c) 1s^{2} 2s^{2} 2p^{5} 3s^{1}

d) 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} 4s^{1}

e) 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{2} 4s^{2}