Electronic configuration of species M2+ is 1s2 2s2 2p63s2 3p6 3d6 and

1.	Electronic configuration of species M2+ is 1s2 2s2 2p63s2 3p6 3d6 and its atomic weight is 56. The number of neutrons in the nucleus of species M is ……(a) 26 (b) 22 (c) 30 (d) 24
Answer» (c) 30 M²⁺ : 1s² 2s² 2p⁶3s² 3p⁶ 3d⁶ M : 1s² 2s² 2p⁶3s² 3p⁶ 3d⁸ Atomic number = 26 Mass number = 56 No. of neutrons = 56 – 26 = 30

Electronic configuration of species M2+ is 1s2 2s2 2p63s2 3p6 3d6 and its atomic weight is 56. The number of neutrons in the nucleus of species M is ……(a) 26 (b) 22 (c) 30 (d) 24

Answer»

(c) 30

M²⁺ : 1s² 2s² 2p⁶3s² 3p⁶ 3d⁶

M : 1s² 2s² 2p⁶3s² 3p⁶ 3d⁸

Atomic number = 26

Mass number = 56

No. of neutrons = 56 – 26 = 30