Final answer:
F2 would need a charge of -2 to generate an ion with a bond order of 2.
Step-by-step explanation:
The bond order of a molecule is related to the number of bonding and anti-bonding electrons between the two atoms. To determine the charge needed on F2 to generate an ion with a bond order of 2, we need to consider the electron configuration of F2. Each fluorine atom has 7 valence electrons.
In F2, there is a sigma bond formed by the overlap of the 2s orbitals and three pi bonds formed by the overlap of the 2p orbitals. The bond order is calculated as (number of bonding electrons - number of anti-bonding electrons) / 2. In F2, there are 8 bonding electrons (2 from sigma bond and 6 from pi bonds) and 4 anti-bonding electrons (2 from sigma bond and 2 from pi bonds). Therefore, the bond order is (8 - 4) / 2 = 2.
To generate an ion with a bond order of 2, F2 would need to gain two electrons. In order to gain two electrons, F2 would need a charge of -2. Therefore, the correct answer is (d) -2.