The correct order of size of atoms is

Options

A. `N gt O gt F`
B. `F gt N gt O`
C. `N gt F gt O`
D. `F gt O gt N`

Answer

To determine the correct order of the size of atoms for nitrogen, oxygen, and fluorine, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Atomic Numbers**:
- Nitrogen (N) has an atomic number of 7.
- Oxygen (O) has an atomic number of 8.
- Fluorine (F) has an atomic number of 9.

2. **Understand Atomic Size Trend**:
- Atomic size generally decreases across a period (from left to right) in the periodic table. This is due to the increasing positive charge in the nucleus, which pulls the electrons closer to the nucleus, resulting in a smaller atomic radius.

3. **Compare the Atoms**:
- Since nitrogen has the lowest atomic number (7), it will have the largest atomic size among the three.
- Oxygen, with an atomic number of 8, will be smaller than nitrogen but larger than fluorine.
- Fluorine, with the highest atomic number (9), will have the smallest atomic size.

4. **Order the Atoms by Size**:
- Based on the above reasoning, the order of atomic sizes from largest to smallest is:
- Nitrogen (N) > Oxygen (O) > Fluorine (F)

5. **Final Order**:
- Therefore, the correct order of size of the atoms is:
- N > O > F