Multiple Choice
Which of the following is the number of protons in an atom of aluminum (Al)?
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2. Atoms & Elements
The Atom
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Which of the following gases is the most abundant in Earth's atmosphere?
A
Nitrogen (N_2)
B
Argon (Ar)
C
Oxygen (O_2)
D
Carbon dioxide (CO_2)
Verified step by step guidance1
Understand that Earth's atmosphere is composed of several gases, each with a different abundance 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 the given gases based on their typical atmospheric concentrations to determine which one is the most abundant.
Recognize that Nitrogen (N\_2) has the highest percentage among the options, making it the most abundant gas in Earth's atmosphere.
Conclude that the correct answer is Nitrogen (N\_2) because it constitutes the largest portion of the atmosphere by volume.
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