-
500 BCE
the Alchemists
The Alchemist started extolling the atomic theory after the death of Aristotle. He didn't make common items into gold as he wanted but he made the scientific process which aloud for the discovery of the atom -
460 BCE
Plato
He was famuse for his atom theory. He beleved that atomsbroke down mathmadicly into triangles. They formed elents likefie, water, air, and earth -
322 BCE
aristotle
He also believed that everything was a combination of the four elements, earth, fire, water, air. He theorist that there was mass everywhere he called hyle. -
Robert Boyle
He is best known for Boyle's law, It describes relationships between volumes of gasses in a controlled environment -
lavoisier
Antoine Lavoisier did experiments to find the total mass of products and reactants,in these expungements the mass always came out the same. this led to the law of conservation of mass. -
john dalton
He proposed that everything was made of atoms. while all atoms were the same different elements ad different size and mass. -
dmitri mendeleev
Mendeleev found at if you put all the elements in order of atomic weight theirs a a pattern. this created the periodic table. -
jj thomson
experiments with cathode ray tubes sowed that atoms contain tiny negatively charged. Thomson proposed the plum pudding model of the atom. -
The curies
Marie Curie was a chemise who studded radio ativity. he found the number of rays emitted from uranium is proponent to the amount of uranium -
albert einstein
Albert Einstein theorized that liquid was made up of molecules, these molecules were always in careless random motion. -
ernest rutherford
he discovered radioactive decay. he also discovered alpha and beta rays -
robert millikan
Millikan began experiments to find the charge of a single electron. he started by measuring the course of charged water droplets in an electric field, he found that all of the drops had charges that were multiples of a single number, the fundamental charge of the electron. -
henry gj moseley
He descend the squares of whole numbers that are equal to the atomic number, this is Moseley's law. -
Neils Bohr
Neils Bohr won a Nobel prize after proposed a theory for the hydrogen atom based on quantum theory that energy. He created the model of the atom -
werner heisenberg
He helped with atomic theory through formulating quantum mechanics. he was discovering the uncertainty principle.
