Which is the reason that ionic compounds are brittle? the bonds between the anions and cations are weak and therefore easily broken. a strong repulsive force is created when cations suddenly align. they involve positive metal ions in a sea of delocalized electrons. they share electrons, which makes the bond brittle.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

a electronegativity decreases beacuse the size of nucleus is bigger.