The air we breathe contains different individual gases (mostly nitrogen and oxygen). Which of the following correctly describes the air we breathe?

A.
element
B.
liquid
C.
compound
D.
mixture

1 answer

D. mixture

The air we breathe is a mixture of different gases, primarily nitrogen (about 78%) and oxygen (about 21%), along with smaller amounts of other gases such as argon, carbon dioxide, and trace gases.