Why are transition elements so named ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Periodic Table Structure:**
- The periodic table is divided into different blocks based on the electron configuration of the elements. These blocks include the S-block, P-block, D-block, and F-block.
- The S-block elements are found on the left side of the periodic table, while the P-block elements are located on the right side. The D-block elements, which are also known as transition elements, are situated in the middle.

2. **Identifying the Transition Elements:**
- Transition elements refer specifically to the D-block elements. These elements have partially filled d-orbitals in their electron configuration.
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