In: Chemistry
The dipole moments decrease across the series PH3 > AsH3 > SbH3 > BiH3. Why do the boiling points increase?
Check all that apply.
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 The electron clouds of the molecules become smaller along the series.  | 
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 The electron clouds of the molecules become larger along the series.  | 
| The smaller numbers of electrons are more polarizable, leading to greater dispersion forces. | 
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 The larger numbers of electrons are more polarizable, leading to greater dispersion forces.  |