How many maximum electrons can M shell have?

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 02 Dec 2022 Shift 3)

Answer 1

The correct answer is 18.

Key Points

Concept:
- The distribution of electrons into different orbits of an atom was suggested by Bohr and Bury.
- The orbits or shells are represented by the letters K, L, M, N,… or the numbers, n = 1, 2, 3, 4.
- The following rules are followed for writing the number of electrons in different energy levels or shells:
- The maximum number of electrons present in a shell is given by the formula 2n2, where ‘n’ is the orbit number or energy level index.
Calculation:
- Given:
- Shell given = M, orbit number = 3.
- The maximum number of electrons present in a shell is given by the formula 2n2.
- Therefore, 2 × 32 = 18