The first element of each group differs significantly from rest of the elements of the same group. Give reasons.

Explanation

### Step-by-Step Solution:

1. **Understanding the Periodic Table**:
- The periodic table is organized into groups (columns) and periods (rows). Each group contains elements that share similar properties.

2. **Identifying the First Element in Each Group**:
- The first element of each group is located in the first period of the periodic table. For example, Lithium (Li) in Group 1, Beryllium (Be) in Group 2, Boron (B) in Group 13, etc.

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