Nitrogen has seven electrons. Since the atomic number of an element tells how many protons and how many electrons are in that element, nitrogen has an atomic number of seven.
Nitrogen was discover in 1772 by Daniel Rutherford of Scotland. This non-metal element has as its symbol the letter N. It has no color, odor or taste. It is basically an inert gas found in such things as fertilizer, explosives and even food. Nitrogen gas comprises 78.1 percent of the Earth's atmosphere, and the human body is 3 percent nitrogen. This element has a valence of three or five. Nitrogen is an essential element for life.