17 - Chlorine diatomic nonmetal
Discovered by Carl Wilhelm Scheele in 1774
- Atomic Radius (Å)
Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine.
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 8 | 2 in 2s + 6 in 2p |
| 3 | 7 | 2 in 3s + 5 in 3p |
35.45 u
Atomic Mass
0.97 Å
Atomic Radius
239.11 K
Boiling Point
1.02 Å
Covalent Radius
3.20e-3 g/cm³
Density
348.57
Electron Affinity
3.16
Electronegativity
12.97 eV
First Ionization Energy
172.31 K
Melting Point
3
Number of Shells
7
Electron Valency
17
Atomic Number
2, 8, 7
Electron Shell Occupations
0.48 J/(g K)
Specific Heat
