What do you mean by saying that energy of the electron is quantized ?

Explanation

To understand the concept of quantized energy of electrons, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Definition of Quantization**:
- Quantization refers to the idea that certain properties, such as energy, can only take on discrete values rather than a continuous range.

2. **Bohr's Model of the Atom**:
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