Asked by Veronica

Which of the following compounds has an atom with an unfilled valence shell of electrons?

A) H3O+
B) BF3
C) CH3OH
D) NaI
Answered by DrBob222
Why not draw the Lewis dot structure and see which one is not complete? Try drawing the Lewis structure for BF3 and see what you get.
Answered by Veronica
Boron is one of the exceptions, correct?

It has 6 valence electrons.
Answered by DrBob222
yes
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