Ionic Compounds and Covalent Molecules?

Question

A common misconception is that molecules of solids are harder than molecules of liquids. Explain why this is false.
Please help me..

Answer 1

First, "hard" has little meaning when applied to molecules. At the molecular level, they are all equally "hard." Just because something is a solid does not mean that its molecules are hard. Also, just because a substance is a liquid, it doesn't mean that the molecules are "squooshy." At 0 deg K, every thing is pretty "hard."