Which of the following species has an atom that has an unfilled valence shell of electrons?

Question

Quizplus · Accepted Answer

Boron trifluoride (BF3) has an unfilled valence shell of electrons as boron only has 3 electrons in its valence shell and it needs 8 electrons to fill its valence shell. This is why it forms 3 covalent bonds with fluorine atoms. The other options, molecular hydrogen (H2), hydroxide anion (OH-), and water (H2O), all have filled valence shells of electrons.

Which of the Following Species Has an Atom That Has