Chlorine, bromine and iodine resemble each other in that all?
-
dissolve in alkalis
- react violently with hydrogen without heating
- displace each other from solutions of their salts
- are gases
- are liquids
The correct answer is: A
Explanation
Alkali metals tend to lose one electron and form ions with a single positive charge.
They form ionic compounds (salts) in reaction with the halogens (alkali halides)