Atom X and Y has +1 and +2 valency respectively. Which among the two is highly
reactive and why?
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a) The valence number of electrons in X is 1 and in Y is 2.
b) The valency of the element is determined by the number of electrons in the outermost shell . Thus, the valency of element X is 1 and Y is 2.
c) Element X is more metallic than Y.
d) The size of element X is more than Y.
e) The formulae of oxide of element X is X
2
O and Y is YO
The formulae of chlorides of element X is XCl and Y is YCl
2
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three kinds of justice mainly enlisted in the Preamble.
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