The number of waves in the third orbit of ` H -` atom is

Options

A. 1
B. 2
C. 4
D. 3

Answer

To find the number of waves in the third orbit of a hydrogen atom, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Principal Quantum Number (n)**:
The principal quantum number (n) indicates the energy level of an electron in an atom. For the third orbit, n is equal to 3.

2. **Understand the Relationship Between Waves and Principal Quantum Number**:
The number of waves formed by an electron in any orbit is equal to the principal quantum number (n). This means that for any given orbit, the number of waves can be directly determined by the value of n.

3. **Apply the Concept to the Given Problem**:
Since we are looking for the number of waves in the third orbit, we substitute n = 3 into our understanding. Thus, the number of waves in the third orbit is equal to 3.

4. **Conclusion**:
Therefore, the number of waves in the third orbit of the hydrogen atom is 3.

### Final Answer:
The number of waves in the third orbit of the H- atom is 3.

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