Answers

2015-01-02T20:27:06+05:30
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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