Question

Mendeleev organize elements in the periodic table in order of increasing ______

You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ______melting point.

Answer 1

The way I would approach this question would be to think of some ionic compounds and ask myself if they are solid a room temperature. Then think of some covalent compounds and ask the same question.

Answer 2

thanks