Element 7
Nitrogen
Nonmetals
Nitrogen (N) is in the p-block of the periodic table — group 15, period 2.
Nitrogen is a chemical element with symbol N and atomic number 7.
Key data
- Atomic number
- 7
- Atomic mass
- 14.007 u
- Group / Period
- 15 / 2
- Block
- p-block
- Phase at STP
- Gas
- Density
- 1.251 g/cm³
- Melting point
- -210.0 °C
- Boiling point
- -195.8 °C
- Electron configuration
- [He] 2s2 2p3
Periodic table block
Nitrogen is in the p-block (group 15, period 2). Elements land in the p-block when their highest-energy electrons fill a p subshell — this region holds most nonmetals, the metalloids, and the metals on the right of the table.
New to this? Periodic table blocks explained: s, p, d, and f
Common uses
- •Fertilizer (ammonia)
- •Liquid coolant
- •Inert atmospheres
Discovery
Year: 1772
Discovered by: Daniel Rutherford
Named by: Jean-Antoine Chaptal
Frequently asked questions
What is the atomic number of Nitrogen?
Nitrogen has atomic number 7. Its symbol is N and its atomic mass is 14.007 u.
What category of element is Nitrogen?
Nitrogen is classified as nonmetals. It sits in group 15, period 2 of the periodic table.
What block of the periodic table is Nitrogen in?
Nitrogen is in the p-block (group 15, period 2). Its highest-energy electrons occupy the p subshell — you can see this in its electron configuration, [He] 2s2 2p3.
What is Nitrogen used for?
Common uses of Nitrogen include: Fertilizer (ammonia), Liquid coolant, Inert atmospheres.
When was Nitrogen discovered?
Nitrogen was discovered in 1772 by Daniel Rutherford.
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