Polarity:
* HF is a polar molecule. This is due to the significant difference in electronegativity between hydrogen (H) and fluorine (F). Fluorine is much more electronegative than hydrogen, meaning it attracts the shared electrons in the bond more strongly.
* This unequal sharing of electrons creates a partial negative charge (δ-) on the fluorine atom and a partial positive charge (δ+) on the hydrogen atom.
Molecular Shape:
* HF has a linear shape. This is because it has only two atoms, and the bond between them is a single covalent bond.
Summary:
HF is a polar molecule with a linear shape due to the electronegativity difference between hydrogen and fluorine.
