What are the differences between the properties of helium and nitrogen?

Helium and nitrogen have different properties. Helium is a noble gas that is lighter than air and does not react with other elements. Nitrogen is a non-metal gas that makes up about 78 of Earth's atmosphere and is essential for living organisms. Helium is used in balloons and as a coolant, while nitrogen is used in fertilizers and as a protective gas in food packaging.