How many electrons in an atom may have the following quantum number ?
`(i) n = 4, m_s = +1//2 " " (ii) n = 3, l = 0`

Explanation

To solve the question of how many electrons in an atom may have the given quantum numbers, we will break it down into two parts as per the question.

### Part (i): n = 4, m_s = +1/2

1. **Identify the Principal Quantum Number (n)**:
- Here, n = 4. This means we are looking at the fourth energy level.

2. **Determine Possible Values of Azimuthal Quantum Number (l)**:
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