AP BIOLOGY

Detailed explanation-1: -Gases. The most abundant naturally occurring gas is nitrogen (N2), which makes up about 78% of air.

Detailed explanation-2: -Read a brief summary of this topic nitrogen (N), nonmetallic element of Group 15 [Va] of the periodic table. It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth’s atmosphere and is a constituent of all living matter.

Detailed explanation-3: -Earth’s atmosphere is composed of about 78 percent nitrogen, 21 percent oxygen, 0.9 percent argon, and 0.1 percent other gases. Trace amounts of carbon dioxide, methane, water vapor, and neon are some of the other gases that make up the remaining 0.1 percent.

Detailed explanation-4: -The other primary reason is that, unlike oxygen, nitrogen is very stable in the atmosphere and is not involved to a great extent in chemical reactions that occur there. Thus, over geological time, it has built up in the atmosphere to a much greater extent than oxygen.

Detailed explanation-5: -Nitrogen gas is known as azote because on the basis of observation it is seen that nitrogen gas is the part of air which cannot support life.