What are the main elements that compose the earth's atmosphere?

Answer 1

Earth's atmosphere is 78% nitrogen, 21% oxygen, and 0.934% argon. The remaining 0.066% (66/1000 of 1%) is made up of a combination of carbon dioxide, hydrogen, ozone, methane, carbon monoxide, helium, neon, krypton, and xenon etc.

Answer 2

Nitrogen is the main element in the Earth's atmosphere. Nitrogen makes up 78 percent of the atmosphere. Oxygen makes up 20 percent. Other elements in small amounts are argon, carbon dioxide, neon, and methane.

Answer 3

The earth's atmosphere is made up of:

-78% Nitrogen.

-21% Oxygen.

-0.93% Argon.

-0.038% Carbon Dioxide.

-And traces of other gases.

So the answer is.........Drumroll please.....

NITROGEN!!!

Answer 4

Composition of dry atmosphere, by volume (the table is from Wikipedia)

ppmv:parts per million by volume (note: volume fraction is equal to mole fraction for ideal gas only, see volume (thermodynamics))

Gas

Volume

Nitrogen (N2)

780,840 ppmv (78.084%)

Oxygen (O2)

209,460 ppmv (20.946%)

Argon (Ar)

9,340 ppmv (0.9340%)

Carbon dioxide (CO2)

394.45 ppmv (0.039445%)

Neon (Ne)

18.18 ppmv (0.001818%)

Helium (He)

5.24 ppmv (0.000524%)

Methane (CH4)

1.79 ppmv (0.000179%)

Krypton (Kr)

1.14 ppmv (0.000114%)

Hydrogen (H2)

0.55 ppmv (0.000055%)

Nitrous oxide (N2O)

0.325 ppmv (0.0000325%)

Carbon monoxide (CO)

0.1 ppmv (0.00001%)

Xenon (Xe)

0.09 ppmv (9×10−6%) (0.000009%)

Ozone (O3)

0.0 to 0.07 ppmv (0 to 7×10−6%)

Nitrogen dioxide (NO2)

0.02 ppmv (2×10−6%) (0.000002%)

Iodine (I2)

0.01 ppmv (1×10−6%) (0.000001%)

Ammonia (NH3)

trace

Not included in above dry atmosphere:

Water vapor (H2O)

~0.40% over full atmosphere, typically 1%-4% at surface

Answer 5

Nitrogen is the largest component of the atmosphere. It comprises about 78% of dry air.

Answer 6

Nitogen,Oxygen, Hydrogen,Helium

Answer 7

nitrogen