what gases are int the atmosphere and the percentages?

Answer 1

PRESENT COMPOSITION OF THE ATMOSPHERE:


The atmosphere is comprised of gases which are considered to be permanent (gases which remain essentially constant by percent) and gases considered to be variable (gases which have changing concentrations over a finite period of time).

PERMANENT gases in the atmosphere by percent are:

Nitrogen 78.1%
Oxygen 20.9%

(Note that these two permanent gases together comprise 99% of the atmosphere)

Other permanent gases:

Argon 0.9%
Neon 0.002%
Helium 0.0005%
Krypton 0.0001%
Hydrogen 0.00005%

VARIABLE gases in the atmosphere and typical percentage values are:

Water vapor 0 to 4%
Carbon Dioxide 0.035%
Methane 0.0002%
Ozone 0.000004%

The table comprising of gases of Atmosphere and their % in
http://www.physicalgeography.net/fundamentals/7a.html

Answer 2

any compound or element that can exist as a gas at STP conditions is present in the Earth atmosphere. for various reasons, most are in such small concentrations as to not be measureable. occassionally they can be artificially concentrated, for example carbon monoxide in an automotive shop or methane in a coal mine.

Answer 3

at present mine has been going decrease backward and forward between sixteen-17%...yet i've got faith it is on slow downward type because of the fact some months in the past it became around 19-20%...by making use of the top of the twelve months i'm hoping to be at one million-2%. while it is going to a unfavorable selection, which would be my clue to bypass on..

Answer 4

Nitrogen 78.084% 99.998%
Oxygen 20.947%
Argon 0.934%
Carbon Dioxide 0.033%
Neon 18.2 parts per million
Helium 5.2 parts per million
Krypton 1.1 parts per million
Sulfur dioxide 1.0 parts per million
Methane 2.0 parts per million
Hydrogen 0.5 parts per million
Nitrous Oxide 0.5 parts per million
Xenon 0.09 parts per million
Ozone 0.07 parts per million
Nitrogen dioxide 0.02 parts per million
Iodine 0.01 parts per million
Carbon monoxide trace
Ammonia trace

Answer 5

78% nitrogen
21% oxygen
1% various {eg Carbon dioxide,argon}