Final answer:
F2 is a nonpolar molecule with no dipole moment because both atoms are fluorine and share electrons equally, thus there is no charge separation.
Step-by-step explanation:
The question asks about the polarity of molecules, specifically whether F2 has a dipole moment. When considering molecular polarity, we must think about the electronegativity of the atoms involved. In the case of F2, both atoms are fluorine with identical electronegativities; therefore, they share the bonding electrons equally, and as a result, there is no separation of charges within the molecule.
This lack of charge separation means that F2 is a nonpolar molecule and does not have a dipole moment. A polar molecule occurs when there is a significant difference in electronegativity between the bonded atoms, causing one end of the molecule to be slightly positive and the other slightly negative.
An example of a polar molecule with a dipole moment would be hydrogen fluoride (HF), where the fluorine atom is more electronegative than the hydrogen atom, creating a bond with a partial negative charge (δ-) on the fluorine and a partial positive charge (δ+) on the hydrogen, giving rise to a dipole moment. However, since F2 consists of two identical atoms, it cannot exhibit such a separation of charge.