In the transition series, with an increase in atomic number, the atomic radius does not change very much. Why is it so?

Explanation

To understand why the atomic radius does not change significantly in the transition series with an increase in atomic number, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Atomic Radius**:
The atomic radius is the distance from the nucleus to the outermost shell of electrons. It can be influenced by the number of protons in the nucleus (nuclear charge) and the number of electron shells.

2. **Increase in Atomic Number**:
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