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Which of the following cannot be chemically broken down into simpler substances?
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1. Intro to General Chemistry
Classification of Matter
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Which element makes up most of Earth's atmosphere?
A
Argon
B
Oxygen
C
Nitrogen
D
Carbon dioxide
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Understand that Earth's atmosphere is composed of several gases, with some present in much larger amounts than others.
Recall the major components of dry air by volume: Nitrogen (N\_2), Oxygen (O\_2), Argon (Ar), and Carbon dioxide (CO\_2), among others.
Recognize that Nitrogen makes up approximately 78% of the Earth's atmosphere, making it the most abundant element by volume.
Note that Oxygen is the second most abundant gas at about 21%, Argon is around 0.93%, and Carbon dioxide is roughly 0.04%.
Therefore, the element that makes up most of Earth's atmosphere is Nitrogen.
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