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    Imagine two elements X and Y .    

    Element X has 5 valence electrons.

     Element Y has 6 valence electrons .  

    Element Y is located to the right of element to the right of element X in the periodic table .

     Neither element X nor element Y can violate the octet . 

    Draw the 3 resonance structures of X2Y and circle the best structure based on formal charges .

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