Final answer:
HF has a polar covalent bond, Na₂O has an ionic bond, CCl₄ has a nonpolar covalent bond, and H₂O has a polar covalent bond.
Step-by-step explanation:
When predicting the type of bonds in compounds, we can determine whether they are ionic or covalent by looking at the electronegativities of the atoms involved. Ionic bonds form between atoms with a large electronegativity difference, while covalent bonds form between atoms with a small electronegativity difference. Here are the predictions for each compound:
(a) HF: Polar covalent bond. This is because fluorine is more electronegative than hydrogen, so the electrons are pulled more towards the fluorine atom.
(b) Na₂O: Ionic bond. Sodium is a metal and oxygen is a nonmetal, so they are likely to form an ionic compound.
(c) CCl₄: Nonpolar covalent bond. Carbon and chlorine have similar electronegativities, so they share the electrons equally.
(d) H₂O: Polar covalent bond. Oxygen is more electronegative than hydrogen, causing the electrons to be pulled towards the oxygen atom.