Rubidium iodide has a lattice energy of -617 kJ/mol, while potassium bromide has a lattice energy of -671 kJ/mol. Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
a) Rubidium and iodide have greater charge than potassium and bromide
b) potassium and bromide have greater charge than rubidium and iodide
c) rubidium and iodide are smaller than potassium and bromide
d)potassium and bromide are smaller than rubidium and iodide.
c)Rubidium and iodide have electrons in the 5th energy level whereas potassium and bromide have electrons in the 4th energy level.
