What is the difference between an ionic and a molecular compound?
A molecular compound, on the other hand, is a pure substance that is formed from nonmetals. It has a fairly low melting point, and can only conduct electricity unless it is aqueous and polar. Another important difference between the two is that an ionic compound is a crystalline solid at standard temperature and pressure (STP), whereas a molecular compound can be in a solid, gas or liquid state at STP.
