Oxygen is O and nitrogen is N.
This gas was carbon dioxide.
The two most abundant elements in the Earth's crust are: Oxygen (46.1%/461,000ppm), and Silicon (28.2%/282,000ppm).
Nitrogen (N2) is the most abundant gas in the Earth's atmosphere having percent volume of 78.8 compare to Oxygen 20.95 %, which falls on the second place after Nitrogen.
In some conditions this is liquid water. Generally water exist as a gas.
Cheating for your homework eh? its Gasoline.
Oxygen, hydrogen & Argon.In order, large percentages of Nitrogen, Oxygen followed by trace amounts of Argon are the most abundant elements in the earth's atmosphere.
Nitrogen
the most abundant gas of the atmosphere is nitrogen with high percentage 78.09
The water is not so abundant in the atmosphere and is very variable (o-1 %).
Nitrogen & oxygen.
Oxygen
Oxygen, not quite Nitrogen makes up 78% of the earth's atmosphere.
This gas was carbon dioxide.
Nitrogen and Oxygen
Hydrogen, Nitrogen, Oxygen
on ancient Earth, nitrogen, water vapor, carbon dioxide, and methane were probably the most abundant gases in the atmosphere.
nitrogen