Oxygen is the chemical element with the symbol O and atomic number 8. The atmosphere is composed of 21 percent of oxygen. (This helps living things on earth to breath)
Nitrogen is the chemical element with the symbol N and atomic number 7. Odorless unreactive gas that forms about 78 percent of the earth's atmosphere.
Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934%.
Answers & Comments
Answer:
According to NASA, the gases in Earth's atmosphere include:
Nitrogen — 78 percent.
Oxygen — 21 percent.
Argon — 0.93 percent.
Carbon dioxide — 0.04 percent.
Trace amounts of neon, helium, methane, krypton and hydrogen, as well as water vapor.
Explanation:
Gases:
Oxygen, Nitrogen, Argon
Describe:
Oxygen is the chemical element with the symbol O and atomic number 8. The atmosphere is composed of 21 percent of oxygen. (This helps living things on earth to breath)
Nitrogen is the chemical element with the symbol N and atomic number 7. Odorless unreactive gas that forms about 78 percent of the earth's atmosphere.
Argon is a chemical element with the symbol Ar and atomic number 18. It is in group 18 of the periodic table and is a noble gas.Argon is the third-most abundant gas in the Earth's atmosphere, at 0.934%.