-
500 BCE
The Alchemists
it is the 4 major elements being water, air, fire, earth. and also that you can change basic substances into different substances. -
442 BCE
Democritus
he is the Greek philosopher that made the theory of the universe. he also made the atomic theory that we still use today. -
350 BCE
Plato
there are 5 regular solids. solves that all objects in the material world are all distinct. -
Robert Boyle
he discovered that atoms have to exist because of the relationship of the pressure and the gas. -
Lavoisier
He was a French chemist he made the concept that an element is a simple substance that cant be broken down. -
John Dalton
he developed the atomic theory that modern physical science is founded- it says that the matter is composed and made of atoms and weight. and the combine in rations determined by weight. -
Mendeleev
he made the first periodic table arranging them in order by atomic number and weight. -
J.J Thompson
he discovered the electron. he also changed the atomic model from what it used to be. -
The Curies
one of the main things they found was that atoms are radioactive.
they also measured radium, polonium, and uranium. -
Albert Einstein
he was one of the people who helped with the atomic bomb. found that it works by splitting an atom by dropping a particle on the atoms nucleus. -
Robert millikan
the experiments to determine the electric charge are carried by a single electron. -
Henry G. J Mosley
he discovered that major properties of an element are determined by the atomic number. -
Neils Bohr
he is a Nobel prize winner for physics because of his discoveries on the atomic structure. -
Heisenberg
he made the uncertainty principle. it is possible to the find the exact spot and momentum of an a particle.
