The elements of group 13 are ............ electronegative than those of groups 1 and 2.

Explanation

To answer the question, "The elements of group 13 are ............ electronegative than those of groups 1 and 2," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Groups**:
- Group 1 consists of alkali metals (e.g., lithium, sodium, potassium).
- Group 2 consists of alkaline earth metals (e.g., magnesium, calcium).
- Group 13 consists of the boron family (e.g., boron, aluminum, gallium).
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