How broad is you knowledge:

78% nitrogen.

Nitrogen (IPA: /'n??tr?(?)d??n/) is a chemical element which has the symbol N and atomic number 7 in the periodic table. Elemental nitrogen is a colorless, odorless, tasteless and mostly inert diatomic gas at standard conditions, constituting 78.08% percent of Earth's atmosphere. Nitrogen is a constituent element of all living tissues and amino acids. Many industrially important compounds, such as ammonia, nitric acid, and cyanides, contain nitrogen. from http://www.wikipedia.org greetings. : )

yes i know that , it is nitrogen and after that it is oxygen right baby!!!!!!!!!!

Nitrogen, it's one of the few facts I remember from grade school. That and the fact that the Earth's surface is 3/4 water, the human body is mostly water, etc.

simply nitrogen atomic no 7 atomic weight 14 presence 78%