Article defines and explains compounds which are either ionic or covalent and molecules which are the simplest unit of a covalent compound. Molecules can be represented in many different ways.

DENSITY is a physical property of matter, as each element and compound has a unique density associated with it. Density defined in a qualitative manner as the measure of the relative "heaviness" of objects with a constant volume. For...

Learn about "hydrocarbons", chemical compounds whose molecules are made up entirely of carbon and hydrogen atoms.