He studied natural philosophy. He came up with the atomic theory, " The universe is composed of two elements."
He was a English chemist. He came up with the idea that all elements consisted of tiny particles called atoms.
He was an English Physicist. He discovered that atoms had electrons.
He discovered that electrons travel in separate orbits.
He discovered that atoms had a nucleus.
He said that electrons were constantly moving and didn’t have one definite or fixed position in the atom.
He discovered neutrons, and that the atomic number is determined by the number of protons in a atom.