What are the postulates of Bohr's model of an atom?

Explanation

**Step-by-Step Solution:**

1. **Electrons in Discrete Orbits**: The first postulate of Bohr's model states that electrons revolve around the nucleus in specific, fixed orbits or shells. These shells are designated as K, L, M, N, etc., or can be represented numerically as n = 1, 2, 3, 4, and so on.

2. **Maximum Number of Electrons**: The second postulate indicates that the maximum number of electrons that can occupy a shell is given by the formula \(2n^2\). For example:
- For the K shell (n = 1): Maximum electrons = \(2 \times 1^2 = 2\)
- For the L shell (n = 2): Maximum electrons = \(2 \times 2^2 = 8\)
- For the M shell (n = 3): Maximum electrons = \(2 \times 3^2 = 18\), but according to Bohr, the maximum is limited to 8.
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