Answer is
Step-by-step explanation:
There are mainly four shells in an atom namely K, L, M, and N.
By using 2n², we can find the maximum number of electrons present in M shell.
Let, K = 1st shell, L = 2nd shell, M = 3rd shell, and N = 4th shell.
K = 1, L = 2, M = 3 and N = 4.
K = 2n² = 2(1)² = 2(1) = 2.
L = 2n² = 2(2)² = 2(4) = 8.
M = 2n² = 2(3)² = 2(9) = 18.
N = 2n² = 2(4)² = 2(16) = 32.
So, The maximum number of electrons present in the M shell is
