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Two elements X and Y have atomic number ...

Two elements X and Y have atomic number 3 and 5 respectively, give the formula of their chlorides.

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Element X: at. No. -3 and
Electronic configuration - 2, 1
Its valency is +1 and the formula of its chloride is XCl.
Element Y: at no. : 5
Electronic configuration -2,3
Its valency is +3 and the formula of its chloride is `YCl_(3)`.
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