Electronic configuration of species M^(2+) is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6) and its atomic weight is 56. The number of neutrons in the nucleus of species M is ..........

Electronic configuration of species M^(2+) is 1s^(2) 2s^(2) 2p^(6) 3s^

1.	Electronic configuration of species M^(2+) is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(6) and its atomic weight is 56. The number of neutrons in the nucleus of species M is ..........
Answer» 26 22 30 24 Solution :`M^(2+)` :`1s^(2) 2s^(2) 2P^(6) 3S^(2) 3p^(6) 3d^(6)`,M :`1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(8)` Atomic number =26 Mass number =56 No. of NEUTRONS =56-26=30