Three elements 'X', 'Y' and 'Z' have atomic numbers 7, 8 and 9 respectively.
State their position (Group number and period number both) in the Modern Periodic Table.

Explanation

To determine the position of elements 'X', 'Y', and 'Z' in the Modern Periodic Table based on their atomic numbers (7, 8, and 9), we can follow these steps:

### Step 1: Identify the Elements
- **Element X** has an atomic number of 7. This corresponds to **Nitrogen (N)**.
- **Element Y** has an atomic number of 8. This corresponds to **Oxygen (O)**.
- **Element Z** has an atomic number of 9. This corresponds to **Fluorine (F)**.

### Step 2: Determine the Period Number
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