🤓 Based on our data, we think this question is relevant for Professor Dixon's class at UCF.
Both Boron (B) and Phosphorus (P) are less electronegative than F.
Since the molecule XF3 has a net dipole moment, we have to find the structure where the dipole moment towards F do not cancel out.
Recall that some molecular shapes are inherently asymmetrical and always lead to polar compounds, as shown below.
The molecule XF3 has a dipole moment. Is X boron or phosphorus?
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Based on our data, we think this problem is relevant for Professor Dixon's class at UCF.
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Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.