True or False: CF₄ is a nonpolar molecule since the central carbon atom has no lone pairs, while NBr₃ is a polar molecule due to the presence of a lone pair on the central nitrogen atom.

Determine the shape and polarity of the molecule described: A molecule has its central atom singly bonded to four identical atoms using polar covalent bonds.  

Shown below is the Lewis structure of a compound.

Identify its molecular shape representation from diagrams I through IV and give the name of the shape. Determine whether the molecule is polar or nonpolar if all the bonds are polar covalent.

Identify the compound below that has a polar bond but is non-polar.

Which of the following molecules is non-polar?