Respuesta :
The Cl-Cl bond is a stronger bond than the F-F bond.
In chemistry, bond strength is the force that a chemical bond uses to hold two atoms together. This is typically stated in terms of the kilocalories per mole of energy needed to break the bond.
The bond strength typically reduces as the binding strength rises. This leads us to the conclusion that triple bonds are both stronger and shorter than double bonds between the same two atoms, and that double bonds are both stronger and shorter than single bonds between the same two atoms.
The F — F bond is weaker than expected because of the size of the fluorine atom. One could assume that F would have a strong pull for electrons given its tiny size, high electronegativity, and short internuclear distance. F is the smallest of the halogens. The lone or non-bonding pairs of electrons are attempting to occupy a very small space between and around the two atoms. In the end, the strength and attraction of their link are reduced by the reciprocal electron repulsion.
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