An element with atomic number 5 belongs to III A group of the modern periodic table. Find Valency

Explanation

To find the valency of an element with atomic number 5 that belongs to group III A of the modern periodic table, we can follow these steps:

### Step 1: Identify the Element
The element with atomic number 5 is Boron (B).

### Step 2: Determine the Electronic Configuration
The electronic configuration of Boron can be determined as follows:
- The atomic number 5 means there are 5 electrons.
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