Final answer:
In a covalent bond between F and H, F prevails due to its stronger attraction for electrons, the result of having more protons in its nucleus than H.
Step-by-step explanation:
When both the F (fluorine) and H (hydrogen) atoms are present in a covalent bond, the F atom prevails because it has a stronger attraction to the bonding pair of electrons. This is due to the fact that fluorine has nine protons in its nucleus compared to hydrogen's one proton, providing a much greater attractive force. This is because the F atom has nine protons in its nucleus, which results in a stronger attraction for the bonding pair of electrons compared to the H atom. As a result, the electrons in the covalent bond are closer to the F atom than the H atom.
As a result, the electrons spend more time closer to the F atom, making the bond polar with the partial negative end on the fluorine.