what is different in the properties of alkali metals and halogens
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Alkali metals have 1 valence electron
They always have valency +1
They can only form cations
They act as reducing agents
They exist normally in the solid state.
Halogens have 7 valence electrons
They always have valency -1
They can only form anions
They act as oxidising agents
They normally are in gaseous/liquid state
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