Yes, nitrogen is a gas at 20 degrees Celsius (68 degrees Fahrenheit).

Here's why:

* Nitrogen's boiling point is -195.79 °C (-320.42 °F). This means that at temperatures above its boiling point, nitrogen exists as a gas.

* 20 °C is well above nitrogen's boiling point. Therefore, nitrogen will be in its gaseous state at this temperature.

Nitrogen is the most abundant gas in the Earth's atmosphere, making up about 78% of the air we breathe.