Question

What is the maximum number of electrons that can be accommodated in the M shell of an atom?

• A. 18
• B. 10
• C. 8
• D. 2

Answer 1

The correct option is A 18

The maximum number of electrons in an orbit is given by $2n^2$. According to Niels Bohr, the shells or orbits in which electrons are present in an atom are represented by K (n=1), L (n=2), M (n=3), N (n=4). The term, 'n' represents the orbit's number. So, M shell will have 2x$3^2$= 2 x 9 = 18 electrons.