Multiple Choice
Which element has an atom that contains exactly 8 electrons in its neutral state?
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2. Atoms & Elements
The Atom
Multiple Choice
Which gas makes up the largest proportion of the air that we breathe?
A
Nitrogen (N_2)
B
Carbon dioxide (CO_2)
C
Oxygen (O_2)
D
Argon (Ar)
Verified step by step guidance1
Understand that air is a mixture of different gases, each present in varying proportions by volume.
Recall the major components of dry air and their approximate volume percentages: Nitrogen (N\_2) about 78%, Oxygen (O\_2) about 21%, Argon (Ar) about 0.93%, and Carbon dioxide (CO\_2) about 0.04%.
Compare these percentages to determine which gas has the highest proportion in the air.
Recognize that Nitrogen (N\_2) has the largest volume percentage among the gases listed.
Conclude that Nitrogen (N\_2) is the gas that makes up the largest proportion of the air we breathe.
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