Two elements A and B belong to group 1 and 2 respectively in the same period. Compare them with respect to
valency

Explanation

To compare the elements A and B with respect to their valency, we can follow these steps:

### Step 1: Identify the Groups
- Element A belongs to Group 1.
- Element B belongs to Group 2.

### Step 2: Understand Valency
- Valency is defined as the combining capacity of an element with another element. It is determined by the number of valence electrons.
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