75% nitrogen, 21% oxygen, 3% other gases.
It is implied that you have already accounted for some gases and the question is about other gases. But you have provided no information about which gases you know about. Furthermore, there is no information on the context: is it the earth's atmosphere? That of another planet or satellite? Products of some chemical reaction?
2/9 as a percentage is 22.22%. This is found by (2/9) * 100%.
Less than 3%
The purity of gas is an indication of the amount of other gases it contains. A high purity refers to a low amount of other gases. Gases of higher purity are considered to be of better quality and are usually more expensive. The purity of gas can be expressed as a percentage value or as a decimal fraction. The decimal fraction is an abbreviation of the percentage value, where the first digit represents the number of nines in the percentage value and the last digit represents the last digit of the percentage value. For example, a purity of 99.97% can be abbreviated as purity 3.7 and a purity of 99.9999% is the same as purity 6.0. Source: http://en.wikipedia.org/wiki/Purity_(gas) So 4.8 = 99.998%
The principle element found at the Earth's core is iron.
there is 1.25 percent of inert gases in the atmosphere
Helium is not one of the primary gases found in Earth's atmosphere. The primary gases in Earth's atmosphere are nitrogen, oxygen, argon, and carbon dioxide. Helium makes up a very small percentage of the atmosphere.
Nitrogen and oxygen make up the largest percentage of the atmosphere.
Nitrogen
The noble gas found in the largest percentage in Earth's atmosphere is argon. It makes up about 0.93% of the atmosphere by volume.
A pie chart would be the best type of graph to show the percentage of gases in Earth's atmosphere. Each gas can be represented as a slice of the pie, with the size of the slice corresponding to the percentage of that gas in the atmosphere.
Inert gases, such as argon, helium, and neon, make up about 1% of Earth's atmosphere. Argon is the most abundant inert gas, comprising about 0.93% of the atmosphere.
78% of the Earth's atmosphere is Nitrogen. Another 21% is oxygen, and the final 1% are other gases found is small amounts such as carbon dioxide, helium and methane.
Nitrogen and Oxygen would be 2 of the gases in the atmosphere.
Other small gases found in the atmosphere include methane, nitrous oxide, and ozone. These gases play a role in the Earth's climate system and are important for understanding the chemistry and composition of the atmosphere.
SP2
Trace.