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The Alchemists contributed to the atomic theory by helping to create the modern day periodic table by developing a theory that by altering the sulfur and mercury levels of a metal you can change that metal into a different metal. -
Plato contributed to the atomic theory by discovering a 5th atom type that makes up most planets, stars, and celestial bodies. -
Democritus contributed to the atomic theory by helping to develop an initial atomic theory originated by Leucippus. -
Robert Boyle contributed to the atomic theory by coming up with a view of matter about particles and a less official theory about chemical elements. -
Antoine Lavoisier contributed to the atomic theory by creating the atomic model. He did this using his findings about the relationship between total mass of products and reactants in a chemical reaction. -
The Billiard Ball Model is different from the other atomic models because there are no electrons, neutrons, or protons within it. -
John Dalton contributed to the atomic theory by coming up with the modern day atomic theory and modern day definition of the atom. -
Amadeo Avogadro contributed to the atomic theory by coming up with two hypotheses, the most important one being that elementary gases are composed of two atoms. -
Dmitri Mendeleev contributed to the atomic theory by discovering the different sections of the periodic table. -
J.J. Thompson contributed to the atomic theory by proving the existence of electrons or negatively charged particles in an atom. -
Pierre and Marie Curie contributed to the atomic theory by discovering radioactive elements. -
The Plum Pudding Model is different from every other atomic model because it had electrons mixed with positively charged protons. -
Albert Einstein contributed to the atomic theory by mathematically proving that the atom exists. -
Robert Millikan contributed to the atomic theory by discovering the electron - the easiest way to find the difference between two different elements. -
Ernest Rutherford contributed to the atomic theory by discovering that aside from the nucleus and electrons the atom is mostly empty space. -
Niels Bohr contributed to the atomic theory by creating a model for the most simple atom, the hydrogen atom. -
The Solar System Model is different from the other atomic models because the electrons orbit around the nucleus. -
Henry Mosely contributed to the atomic theory by discovering the atomic number or how we differentiate atoms in the periodic table. -
Erwin Schrödinger contributed to the atomic theory by creating an equation to calculate the energy levels of any atom. -
The Electron Cloud Model is different from the other atomic models because the nucleus is surrounded by moving electrons. -
Werner Heisenberg contributed to the atomic theory by discovering that a particle's position and momentum cannot exactly be known. -
James Chadwick contributed to the atomic theory by discovering an important part of the atom, the neutron.