Question

8. Electronic configuration of species M2+ is 1s² 2s² 2p⁶ and its atomic weight is 24. The number of neutrons in the nucleus of species M2+ is
a) 12
b) 13
c) 11
d) 14​

Answer 1

Answer:

12

Explanation:

e = ( 2 + 2 +6 ) = 10

Here , mass number : A = 24

Z = No. of protons = No. of electrons in the neutral atom = 10+2 = 12

Mass Number = 24

No. Of Neutrons = Mass No.- Atomic No. = 24-12= 12

Hence , the correct option is A