7 - Nitrogen diatomic nonmetal
Discovered by Daniel Rutherford in 1772
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.
Periodic table
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 5 | 2 in 2s + 3 in 2p |
Electron shells
colorless gas, liquid or solid Appearance
14 u Atomic Mass
0.65 Å Atomic Radius
77.4 K Boiling Point
15 Group
-3, 3, 5 Common Oxidation States
0.71 Å Covalent Radius
0.00125 g/cm³ Density
−6.8 kJ/mol Electron Affinity
1s2 2s2 2p3 Electron Configuration
[He] 2s2 2p3 Electron Configuration (semantic)
3.04 Electronegativity
7 Electrons
14.5 eV First Ionization Energy
-3, -2, -1, 1, 3, 5 ICSD Oxidation States
1402.3, 2856, 4578.1, 7475, 9444.9, 53266.6, 64360 kJ/mol Ionization Energies
63.3 K Melting Point
100 Mendeleev Number
2 Number of Shells
5 Electron Valency
7 Neutrons
7 Atomic Number
8 Number of Isotopes
-3, -2, -1, 1, 2, 3, 4, 5 Oxidation States
2 Period
Gas Phase
7 Protons
2, 5 Electron Shell Occupations