Question

For a multielectron atom, filling of which subshell takes place just after 5d?​

Answer 1

For a multielectron atom, filling of 6p subshell takes place just after 5d.

• According to Aufbau principle the electrons of an atom or ion in ground state started to fill from the subshell of lowest available energy to subshell of highest available energy.
• The increasing order of the energy of the subshell in an atom at ground state is-
• 1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p.
• Thus for a multielectron atom filling of 6p subshell which has higher energy than 5d takes place.