Nitrogen (N)
Nitrogen (N, element 7) is a nonmetal in group 15, period 2. Atomic mass 14.007, electron configuration [He] 2s² 2p³, uses and facts.
About Nitrogen
Nitrogen is a nonmetal with the symbol N and atomic number 7. It is a gas at room temperature, and it sits in group 15, period 2 of the periodic table. Nitrogen was discovered in 1772 by Daniel Rutherford.
Nitrogen key facts
- Atomic number: 7
- Symbol: N
- Atomic mass: 14.007 u
- Category: nonmetal
- Group: 15
- Period: 2
- State at room temperature: gas
- Electron configuration: [He] 2s² 2p³
- Electronegativity (Pauling): 3.04
- Melting point: 63.15 K (-210 °C)
- Boiling point: 77.36 K (-195.79 °C)
- Density: 0.001251 g/cm³
- Common oxidation states: −3, −2, −1, 0, +1, +2, +3, +4, +5
Electron configuration
The electron configuration of nitrogen is [He] 2s² 2p³. The part in brackets is the noble gas core; the rest shows how the outer electrons fill their subshells. Nitrogen has 5 valence electrons.
Uses of nitrogen
- Fertilizers
- Explosives
- Food preservation
Did you know?
Makes up 78% of Earth's atmosphere. The air you breathe is mostly nitrogen.
Other elements in group 15 and neighbours
Frequently asked questions
What is the atomic number of nitrogen?
The atomic number of nitrogen is 7, which means every nitrogen atom has 7 protons.
What is the electron configuration of nitrogen?
The electron configuration of nitrogen is [He] 2s² 2p³.
What group and period is nitrogen in?
Nitrogen is a nonmetal in group 15, period 2.
What state is nitrogen at room temperature?
Nitrogen is a gas at room temperature.
What is nitrogen used for?
Nitrogen is used for fertilizers, explosives, food preservation.