Which is a gas at room temperature?
a) aluminum
b) nitrogen
c) potassium
d) sodium

B) Nitrogen is a gas at room temperature because it has a low melting point and a low boiling point. In fact, you would have to bring down the temperature of nitrogen to about -197 degrees Celsius in order for its gaseous form to condense into a liquid.

Fun fact: About 78% of the air we breathe consists of nitrogen.

Let me know if you have any questions.

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