PP Presentation
CHEMISTRY of HALOGENS
The Elements
- Group 7A - all non-metals
- diatomc molecules: F2 (gas), Cl2 (gas), Br2 (liquid), I2 (solid)
- most stable oxidation state: -1
- Undergo OXIDATION-REDUCTION reactions readily
with metals (all elements on right and middle of P.T.)
Trends:
SIZE: I > Br > Cl > F
Electron affinity: F > Cl > Br > I
Oxidizing strength F > Cl > Br > I
Compounds
most stable form: HALIDES (A+X-)
hydrogen halides: ACIDS: HCl (strong), others (weak)