atoms and elements.
What is an atom?
An atom is the simplest particle of matter that can take part in a chemical reaction.
What is an element?
Elements are made up of only one type of atom. They are pure substances.
Molecules and compounds.
What are molecules?
Atoms can join together in groups. These atoms are joined together by chemical bonds. These groups, wshich may be large or small, are called molecules.
What are compounds?
A compound is formed when atoms from different elements join together by chemical bonds.
What is ethanol?
ethanol is made up of three elements. Carbon, hydrogen and oxygen.Ethanol is made up of 9 atoms. ( 2 carbon, 6 hydrogen and 1 oxygen.) Ethanol is a module because it has more than one atom chemically joined. Ethanol is a compound because it is made up up of more than one type of atom.