Final answer:
The solid that will most easily conduct electricity is Fe (iron) due to its metallic bonding structure as metallic solids are good conductors of electricity. Ionic solids like FeCl3, FeO2, and MgF2 do not conduct electricity in solid form but can when molten.
Step-by-step explanation:
To determine which solid will most easily conduct electricity based on chemical structure, we need to consider the type of bond and the mobility of electrons or ions within the solid. Solids with metallic bonds are typically good conductors of electricity because they have a sea of delocalized electrons that are free to move and carry charge. Among the given options, Fe (iron) would be the best conductor of electricity due to its metallic bonding structure. FeCl3, FeO2, and MgF2 are ionic solids which don't conduct electricity in their solid state because the ions are fixed in place within the crystal lattice. They can, however, conduct electricity when melted because the ions can move freely in the liquid state. Considering FeCl3, FeO2, and MgF2, none of these will conduct electricity as well as metallic Fe in their solid forms. Melting points of different types of solids are affected by their electron configuration. Generally, metallic solids have varying melting points based on their electron configuration and bond strength.