What are the two most abundant elements in the atmosphere?

Answer 1

The 10 most abundant elements in the universe in from greatest to least are hydrogen, helium, oxygen, neon, nitrogen, carbon, silicon, magnesium, iron, and sulfur. Refer to the related link below for a table that gives the relative abundance of the 10 most abundant elements.

Answer 2

It depends on if you are measuring by mass or by moles.

The human body is estimated to be over 65% water (H2O) by varying estimates.

Hydrogen is also part of every "hydrocarbon" in the body. However, it is also the lightest of the elements.

So, in moles, your top 3 elements would be: Hydrogen, Oxygen, and Carbon.

However, in mass they are reversed as: Oxygen, Carbon, and Hydrogen.

See the Wikipedia article:
http://en.wikipedia.org/wiki/Composition_of_the_human_body

Answer 3

Earth's atmosphere is a mixture of gases. There names and composition are as follows:

1. Nitrogen-78%
2. Oxygen-21%
3. Argon -0.9%
4. Carbon dioxide- 0.03%
5. Water vapour and other gases- very small quantities

Answer 4

Hydrogen is the most abundant, followed by helium.

Answer 5

Helium, Hydrogen. They are the bulding blocks of the universe

Answer 6

The two most abundant elements in the atmosphere are the gases:

Nitrogen (78%)

Oxygen (21%)

Answer 7

The two most abundant elements in Earth's atmosphere are nitrogen (about 78%) and oxygen (about 21%). Collectively, they make up the majority of the gases in the atmosphere.

Answer 8

Hydrogen and helium.