How will you find the valency of nitrogen, oxygen and fluorine?

Explanation

To find the valency of nitrogen, oxygen, and fluorine, we can follow these steps:

### Step 1: Understand Valency
Valency is defined as the combining capacity of an element, which is determined by the number of electrons an atom can gain, lose, or share to achieve a stable electronic configuration (usually an octet).

### Step 2: Determine Atomic Numbers and Electronic Configurations
- **Nitrogen (N)**: Atomic number is 7.
- Electronic configuration: 2, 5 (2 electrons in the K-shell and 5 in the L-shell).
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