1 g atom of nitrogen represents

Options

A. 14 g nitrogen
B. 11.2 litre of `N_(2)` at NTP
C. 22.4 litre of `N_(2)` at NTP
D. `6.022xx10^(23)` molecules of `N_(2)`

Answer

To solve the question "1 g atom of nitrogen represents," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the term "gram atom":**
- A "gram atom" refers to the amount of a substance that contains Avogadro's number of atoms (approximately \(6.022 \times 10^{23}\) atoms) and has a mass equal to its atomic weight in grams.

2. **Identify the atomic weight of nitrogen:**
- The atomic weight of nitrogen (N) is approximately 14 g/mol. Therefore, 1 gram atom of nitrogen is equivalent to 1 mole of nitrogen atoms.

3. **Convert gram atom to grams:**
- Since 1 gram atom of nitrogen corresponds to 1 mole, it represents 14 grams of nitrogen.

4. **Calculate the number of atoms:**
- 1 mole of nitrogen atoms contains \(6.022 \times 10^{23}\) atoms. Therefore, 1 gram atom of nitrogen also represents \(6.022 \times 10^{23}\) nitrogen atoms.

5. **Consider nitrogen gas (N₂):**
- Nitrogen gas (N₂) consists of two nitrogen atoms. Therefore, if we have 1 mole of nitrogen atoms (1 gram atom), it will form half a mole of nitrogen gas (N₂), which is \(3.011 \times 10^{23}\) molecules of N₂.

6. **Volume at STP:**
- At standard temperature and pressure (STP), 1 mole of any gas occupies 22.4 liters. Therefore, half a mole of N₂ will occupy \(11.2\) liters.

### Final Answer:
1 g atom of nitrogen represents:
- 14 g of nitrogen
- 11.2 L of N₂ at NTP
- \(6.022 \times 10^{23}\) nitrogen atoms
- \(3.011 \times 10^{23}\) molecules of N₂