The principal quantum number of an atom is related in the

Options

A. Size of the orbital
B. Spin angular momentum
C. Orbital angular momentum
D. Orientation of the orbit in space

Explanation

To solve the question regarding the relationship of the principal quantum number of an atom to the size of the orbital, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Principal Quantum Number (n)**:
- The principal quantum number (n) indicates the main energy level or shell of an electron in an atom. It can take positive integer values (n = 1, 2, 3, ...).

2. **Relation to Orbital Size**:
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