An atom is always an element . but an element is not always an atom. but an element can also be a compound . an example is which is an element and an atom while is an element and a molecule. a molecule is always made up of non-metals which are found to the right of the stairs on the ptoe. a molecule is always than one . but may be made up of or more the same elements or two or more elements. a molecule such as or are examples of molecules . molecules are always covalent bonds which are made up of . a compound is always than elements and must be made up of two types of elements. an example of a compound that is made of of non-metals is which can also be called a because it has more than one type of . an example of a compound that contains a metal is which is called a compound. formula units are always ionic bonds which means that they contain a . the difference between an atom and a molecule is the of elements in the formula. the difference between an element and a compound/formula is the of elements in the formula.