What is the percentage of argon in air ?

Explanation

To find the percentage of argon in the air, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Composition of Air**:
- The air is composed of several gases, with the major components being nitrogen (N₂), oxygen (O₂), argon (Ar), and carbon dioxide (CO₂).

2. **Look Up the Percentages of Each Gas**:
- According to reliable sources such as NASA, the composition of air is approximately:
- Nitrogen (N₂): 78%
- Oxygen (O₂): 21%
- Argon (Ar): 0.93%
- Carbon Dioxide (CO₂): 0.04%
- Other trace gases: negligible amounts

3. **Focus on Argon**:
- From the data, we see that argon constitutes 0.93% of the air.

4. **Round the Value if Necessary**:
- For simplicity, it can be approximated that argon makes up about 1% of the air.

5. **Conclusion**:
- Therefore, the percentage of argon in air is approximately 0.93%, or rounded to about 1%.

### Final Answer:
The percentage of argon in air is approximately **0.93%** (or about **1%** when rounded).

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