Chemistry 5070 · O Level · Simple molecules and covalent bonds

Simple molecules and covalent bonds — practice question

Boron trifluoride, $\text{BF}_3$, is a simple molecule. Each $\text{BF}_3$ molecule contains three covalent bonds. Every one of these bonds is formed by the sharing of one electron from the boron atom and one electron from a fluorine atom. What is unusual about the bonding in boron trifluoride?

  • AIt is unusual for a non-metal such as fluorine to form covalent bonds.
  • BThe boron atom in each molecule does not gain the electronic configuration of a noble gas.
  • CThe covalent bonds do not consist of shared pairs of electrons.
  • DThe fluorine atoms in each molecule do not gain the electronic configuration of a noble gas.

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