Question

Which of the following gases is NOT found in Earth’s atmosphere?
a. oxygen
c. hydrogen
b. nitrogen
d. all of the above are in the atmosphere

Answer 1

d is the answer hoped i helped

Answer 2

d. all of the above are in the atmosphere is the correct answer.

Oxygen accounts for 21% and nitrogen accounts for 78% of the atmosphere. Hydrogen accounts for little percent, but still appears in the atmosphere.

Hope this helps~