what kind of attractive forces must be overcome to melt ice boil molecular bromine melt solid iodine and dissociate f2 into f atoms

Answer: to melt ice = hydrogen bond must be broken, boiling of molecular bromine and the melting of solid iodine = dispersion force must be broken, and

dissociation of f2 into f atoms = covalent bond must be overcome.

Explanation:

(1). For the melting of ice, the hydrogen bond in ice is directional and linear. The Hydrogen bond in ice is as strong as covalent bond. Ice melts to form water that is the breaking of Hydrogen bonds plus the breakage of dispersion interactions.

Hydrogen bond is an electrostatic interactions between hydrogen atom that is bonded to a more electronegative atom for example, oxygen, Halogens and so on.

(2). and (3).;

For the boiling of molecular bromine and the melting of solid iodine and dissociate f2 into f atoms; iodine molecule is a non polar molecule, hence only dispersion force will be overcome. Iodine sublime because they have covalent bonds within the bonds.

To dissociate F2 molecule, the forces of the covalent bond must be broken.