Robert Boyle (1627-1691) is sometimes called the Father of chemistry . He started out as an alchemists,but he began to think in a different way. For example,alchemists thought that everything was made of four thing-earth,air,fire,and water.But Boyle found that thing are made up of many different elements. In fact,he wrote a definition of what an element is. He said that an element is something that cannot be broken into smaller parts. Boyle is work marked the end of alchemy as a science.