Question

Number of shell in which valence electrons of iodine lies:

Answer 1

The electronic configuration of iodine is:$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^{6}4d^{10}5s^{2}5p^5$.

The number of shell in which valence electrons of iodine lies is 5.