Which of the following correctly describes a non-polar covalent bond?

A non-polar covalent bond is characterized by the equal sharing of electrons between two atoms. This occurs typically between atoms of the same element or between atoms that have very similar electronegativities. In a non-polar bond, the electron distribution is balanced, resulting in no significant charge difference across the molecule. As a result, these molecules do not exhibit a dipole moment.

Other options, while relevant to the topic, do not accurately describe non-polar covalent bonding. The transfer of electrons pertains to ionic bonds, where one atom completely donates an electron to another, leading to the formation of ions. Unequal sharing, on the other hand, is characteristic of polar covalent bonds, where the electronegativity difference creates a dipole. Lastly, the mention of metal and non-metal combinations typically relates to ionic bonding, rather than covalent bonding, as covalent bonds usually occur between non-metals.