Who reported for element classifications, but included some substances that were combinations of elements rather than true elements and his listing Who reported for element classifications, but included some substances that were combinations of elements rather than true elements and his listing Solution Ans: \"Four Element Classification\" was done by Antoine Lavoisier. He classified them(elements) into four groups: Elastic fluids, nonmetals, metals and earths. Some of them were not really elements for example: light and heat. And some where compounds actually instead of elements,such as hydrochloric acid(HCl). .