Problem: Hypothetical elements X and Y form a molecule XY2, in which both Y atoms are bonded to atom X (and not to one another). The X–X distance in the elemental form of X is 2.04 Y–Y and the Y distance in elemental Y is 1.68 Y–Y. What would you predict for the distance in the XY2 molecule?

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We are asked to predict the distance in the XY2 molecule.

X-Y bond length = X radius +Y radius


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Problem Details

Hypothetical elements X and Y form a molecule XY2, in which both Y atoms are bonded to atom X (and not to one another). The X–X distance in the elemental form of X is 2.04 Y–Y and the Y distance in elemental Y is 1.68 Y–Y. What would you predict for the distance in the XY2 molecule?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Atomic Radius concept. You can view video lessons to learn Periodic Trend: Atomic Radius. Or if you need more Periodic Trend: Atomic Radius practice, you can also practice Periodic Trend: Atomic Radius practice problems.

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Based on our data, we think this problem is relevant for Professor Randles' class at UCF.