- Halogens all have similar reactions because they're in the same group.
- All react with metals to form metal halides.
eg:
POTASSIUM + BROMINE >>>> POTASSIUM BROMIDE
2K (s) + Br2 (l) >>>>> 2KBr (s)
CALCIUM + CHLORINE >>>> CALCIUM CHLORIDE
Ca (s) + Cl2 (g) >>>>> CaCl2 (s)
Each halogen need ONE more electron to complete its outer shell, so they all form ions with a charge of -1. Flourine is the most reactive halogen and iodine is the least reactive.
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