1 String str = Java String to String Array Example; /*. * 2  To convert String object to String array, first thing. * 3  we need to consider is to how we want to create array. *. * 4  In this example, array will be created by words contained. *  in the original String object.
A molecule is a group of two or more atoms bonded together, while a compound is a group of two or more atoms bonded together where the atoms are from at least two types of elements. All compounds are also molecules, but all molecules are not compounds.
A chemical element is a substance that contains only one type of atom. If a substance contains more than one type of atom, it is a compound. An element can be a solid, liquid or gas. The smallest particle of such an element is an atom. Atoms are made up of protons, neutrons, and electrons.