The three stable (i.e., nonvariable) gases in the atmosphere, in order of abundance from most to least, are
A) carbon dioxide, argon, oxygen.
B) oxygen, carbon dioxide, argon.
C) nitrogen, oxygen, argon.
D) oxygen, argon, nitrogen.

Question

Quizplus · Accepted Answer

The three stable gases in the atmosphere are nitrogen (78%), oxygen (21%), and argon (0.9%). Carbon dioxide is a variable gas and its concentration can change based on different factors like human activity and natural processes. Therefore, option A and B are incorrect. Option D has the correct gases listed but in the incorrect order of abundance. Hence, option C is the best choice with the correct order of abundance.

The Three Stable (I