1. Nitrogen Element Symbol: N Atomic Number: 7 Atomic Mass: 14.0067

2. Period, 1; Group 15 Drawing of a Nitrogen Atom Liquid Nitrogen

3. (i) Color: Nitrogen is a colorless gas. (ii) Odor: It has no odor. (iii) Taste: It is a tasteless gas. (iv) Vapor density: The vapor density of nitrogen is 14 (Vapor density of air = 14.4). Hence it is slightly lighter than air. (v) Solubility: Nitrogen is slightly soluble in water. 1 liter of water dissolves about 22 ml of nitrogen at 0 o C. (vi) Liquefaction: When cooled and compressed nitrogen liquefies to a colorless liquid, which boils at -196 o C. When further cooled, it freezes to a white snow like solid, which melts at -210 o C. Physical Properties

4. Isotopes and Ions Isotopes Ions

5. Founder Discovered in Scotland

6. Uses of Nitrogen Nitrogen is used to make light bulbs Nitrogen is used to make some explosives like TNT

7. The word "Nitrogen" means, "giving rise to niter." An Interesting Fact