Polar
Polar!
HBr is a polar covalent molecule. The electronegativity difference between hydrogen and bromine causes an unequal sharing of electrons, resulting in a partial positive charge on hydrogen and a partial negative charge on bromine.
They are both linear, because both have only two atoms. HBr is more polar than br2, because H and Br are different atoms. So, the bond is polar, given that H and Br have differing capacities to attract electrons
Nonpolar
nonpolar
HF is the least polar among these molecules because it has the smallest difference in electronegativity between the hydrogen and the fluorine atoms.
It is nonpolar
nonpolar
nonpolar
Yes, gas molecules can be polar if they have an uneven distribution of electrons leading to partial positive and negative charges. Examples of polar gases include water vapor and hydrogen fluoride.
nonpolar
polar