Proposed by Democritus; believed everything is composed of atoms, that between them lies empty space, they are in constant motion, and there is an infinite amount of atoms and types of atoms.
Billiard Ball Model
John Dalton: Proposed that all mater was composed of atoms that are indestructible and very atom of the same element was identical.
Birth of Niels Bohr
Plum Pudding Model
Proposed by JJ Thomson; atoms have a structure similar to plum pudding, with tiny, negatively, charged electrons inside a positively charged substrate
Worked in Professor Rutherford’s laboratory in Manchester, where he founded his theory.
Bohr Model/Bohr's Findings
Made the Bohr Atomic Model: shows the atom as a small, positively charged nucleus surrounded by orbiting electrons. Bohr was the first to discover that electrons travel in separate orbits around the nucleus and that the number of electrons in the outer orbit determines the properties of an element.
Bohr won Nobel Peace Prize of Physics
Proposed by Erwin Schrodinger; used mathematical equations to describe the likelihood of finding an electron in a certain position.