Question

An element X shows a variable valency of 3 and 5 write down the formula of its oxides formed by it

Answer 1

Answer:

let the element X

case 1

valency of X equal +3

valency of oxide O equal -2

so the formula for the oxide of the element X equal X square O cube

case 2

valency of X equal +5

valency of O equal -2

so the formula for the oxides of the element X equal X square O fifth

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