(i) Name three elements each whose ions have valency +1, +2 and +3 res – InterviewSolution

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1.

(i) Name three elements each whose ions have valency +1, +2 and +3 respectively.(ii) Name three non-metals/radicals which have valency -1, -2, and -3.

Answer»

(i) +1 = Hydrogen, Sodium, Potassium.

+2 = Calcium, Magnesium, Zinc.

+3 = Aluminium, Chromium, Ferric [Fe (III)]

(ii) -1 = Chlorine, Bromine, Iodine.

-2 = Oxide, Sulphide, Sulphate.

-3 = Nitrogen, Nitride Phosphate.

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