scientist trained in the study of chemistry
A chemist is a scientist who studies chemistry. In England can also mean a pharmacist (person who dispenses medicines that doctors prescribe for people).
Chemistry is the study of elements, atoms, molecules, and how they react together. Chemists research and test medicines, explosives, and a lot of other things. Chemistry is an important science. It helps industry and pharmacology.
Chemists are people who study compounds and find new ways to do chemical reactions. They make chemicals in order to find new ways to do things, like to make a better glue, or to make new medicines, or to make things clean, for example. They also use compounds to find out more about the laws of chemistry.