The conversation between human and AI assistant.
What is the Lewis structure of SiF4, and how does it compare to that of helium?
That's helpful. Can you give me an example of a molecule that has a polar covalent bond?
One example of a molecule with a polar covalent bond is water (H2O). The oxygen atom has a higher electronegativity than the hydrogen atoms, causing the electrons in the bond to be pulled closer to the oxygen atom, creating a partial negative charge on the oxygen and partial positive charges on the hydrogens.