7N14.007
Diatomic Non-Metalp-block
Nitrogen
Element 7 on the periodic table, symbol N, group 15, period 2.
Nitrogen is a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System.
Appearance: colorless gas, liquid or solid
Properties
- Atomic Number
- 7
- Atomic Mass
- 14.0070 u
- Group
- 15
- Period
- 2
- Block
- p-block
- Category
- Diatomic Non-Metal
- State at 25 °C
- Gas
- Melting Point
- 63.2 K · -210 °C
- Boiling Point
- 77.4 K · -195.8 °C
- Density
- 1.251 g/L
- Atomic Radius
- 65 pm
- Electronegativity
- 3.04
- Oxidation States
- -3, +3, +5
- Abundance in Crust
- 19 mg/kg
- Discovered
- 1772
- Discovered By
- Daniel Rutherford
Electron Configuration
[He] 2s2 2p3
1s2 2s2 2p3
Ionisation Energies (kJ/mol)
- 1. 1,402.3
- 2. 2,856
- 3. 4,578.1
- 4. 7,475
- 5. 9,444.9
- 6. 53,266.6
- 7. 64,360
Elements near Nitrogen
Elements in the same group share the number of outer electrons and behave in similar ways. Elements in the same period share a shell, so they change steadily from left to right.