#7
Nitrogen
diatomic nonmetal· Gas·14.007 u
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.
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Identity
- Symbol
- N
- Atomic Number
- 7
- Atomic Mass
- 14.007 u
- Category
- diatomic nonmetal
- Block
- p-block
- Period
- 2
- Group
- 15
- Appearance
- colorless gas, liquid or solid
- Year Discovered
- 1772 CE
- Discovered By
- Daniel Rutherford
- Named By
- Jean-Antoine Chaptal
Electrons
- Configuration
- [He] 2s2 2p3
- Full Configuration
- 1s2 2s2 2p3
- Shells
- 2, 5
- Electronegativity
- 3.04
- Electron Affinity
- -6.8
- Oxidation States
- +5, +4, +3, +2, +1, -1, -2, -3
- Ionization Energies
- 1402.3, 2856, 4578.1, 7475, 9444.9 … +2 more
Physical Properties
- State at
- Gas
- Melting Point
- 63.15
- Boiling Point
- 77.355
- Density
- 1.251
- Crystal Structure
- HEX
- Magnetic Ordering
- Diamagnetic
Mechanical
- Atomic Radius
- 56 pm
- Covalent Radius
- 71 pm
- Van der Waals
- 155 pm
Thermal & Electrical
- Thermal Conductivity
- 0.02583 W/(m K) W/(m·K)
- Specific Heat
- 1040 J/(kg K) J/(g·K)
- Heat of Vaporization
- 2.79 kJ/mol kJ/mol
- Heat of Fusion
- 0.36 kJ/mol kJ/mol
Abundance
- Universe
- 960 ppm
- Sun
- 1000 ppm
- Meteorite
- 15 ppm
- Earth's Crust
- 19 ppm
- Ocean
- 500 ppb
- Human Body
- 2.60%