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.
H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
57-71 La-Lu Lanthanides
89-103 Ac-Lr Actinides
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 5 | 2 in 2s + 3 in 2p |
14 u Atomic Mass
0.75 Å Atomic Radius
77.4 K Boiling Point
0.71 Å Covalent Radius
0.00125 g/cm³ Density
−6.8 Electron Affinity
3.04 Electronegativity
14.5 eV First Ionization Energy
63.3 K Melting Point
2 Number of Shells
5 Electron Valency
7 Atomic Number
2, 5 Electron Shell Occupations
1.04 J/(g K) Specific Heat