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10 cards from this deck
Fluorine and chlorine are gases; bromine is liquid; iodine is solid.
They form ionic compounds by gaining electrons.
Chlorine gas is greenish-yellow in color.
Boiling points increase down the group due to larger molecules.
Reactivity decreases down the group; fluorine is most reactive.
They form hydrogen halides, like HCl and HBr.
Iodine turns blue-black in starch solution.
Chlorine is commonly used to disinfect drinking water.
Bromine is used in flame retardants and certain pesticides.
More reactive halogens can displace less reactive ones.
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