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oxogen: unkown because of unknown life.

elements: everything but pure potassium because that was not made till 1900's because it acts with air

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What element in earths atmosphere was not present in the far past but is present now?

The element "Oxygen".


What are the primary elements that make up the earths atmosphere?

nitrogen and oxygen


What are the top three elements in the earths atmosphere?

The top three elements in Earth's atmosphere are nitrogen (78%), oxygen (21%), and argon (0.93%). These three elements together make up the vast majority of the gases present in the atmosphere, with nitrogen being the most abundant.


What is the approximate percent of oxygen by volume present earths lower atmosphere?

Oxygen makes up about 21% of Earth's lower atmosphere by volume.


What is the approximate percent of oxygen by volume present in earths lower atmosphere?

The approximate percent of oxygen in Earth's lower atmosphere is around 20.95% by volume.


WHAT IS THEAPPROXIMANT PERCENT OF OXYGEN BY VOLUME PRESENT IN EARTHS LOWER ATMOSPHERE?

The approximate percentage of oxygen in Earth's lower atmosphere is around 21% by volume.


What are the symbols of the 2 most abundant elements found in earths atmosphere?

Oxygen is O and nitrogen is N.


Which is the approximate percentage by volume of oxygen present in earths atmosphere at location 2?

The approximate percentage by volume of oxygen in Earth's atmosphere at location 2 is around 21%.


What 2 elements are the most common in earths atmosphere?

The two most common elements in Earth's atmosphere are nitrogen, making up about 78%, and oxygen, making up about 21%.


What are the 3 most common elements that make up the gases in out earths atmosphere?

These gases are nitrogen, oxygen and argon.


What is the air that makes up earths atmosphere?

Earths atmosphere is 78% nitrogen,21%oxygen,0.9% argon,and 0.03% carbon dioxide with very small percentages of other elements


What are the names of all the elements in earth's atmosphere?

the earths atmosphere is 77% nitrogen, 21% oxygen, with traces of argon, carbon dioxide and water.