-
400
Persian war
persia and sparta go to war over territory. -
460
Domocitrus
He said that all matter is made up of small unbreakable particles called atoms. -
466
aristotle
Provided the method of gathering scientific facts, which proved as the basis for all scientific work. -
May 14, 1580
Copernicus
Said that the earth is not the center of the universe -
Isaac Newton
Created newtons laws, gravity, and force. -
Evangelista Torricelli
Created the barometer which is used to measure atmospheric pressure. -
Evangelista Torricelli
Invented the early invention of the calculator. -
Otooman and europe
Wars break out between Japan and parts of europe. -
Lavoisier
Provided the formula for the conservation of matter. -
Coulumv
Formulated the law that the force between two electrical charges is proportional to the product of the charges and inversly proportional to the square of the distanc e between them. -
Couloumb
Created couloumbs law which states that that the force between two electrical charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. -
John Dalton
He discovered homogeneous gases.He started the investigation of thermal conductivity in liquids. -
Crooks
Created the crookes tube and demonstrated that cathode rays travel in straight lines and produce phospherecsence when they strike certain materials. -
Wilhelm Roentgen
CHanged the mass of an electron and discovered the xray -
Henri Becquerei
While studying the effect of x-rays on photographic film, he discovered some chemicals spontaneously decomposeand give off very penetrating rays. -
J, J Thompson
He won the nobel prize for studying the cathode ray along with the electron. -
Marie Curie
Nobel prize in 1903 for developing methods of seperating radium from radioactive residues. -
max planck
he originated the quantum theory. -
Robert milikan
Dtermined the charge and mass of an electron. -
Ernest rutherford
Investigated the scattering of alpha rays and the nature of the inner structure of the atom, discovered the electron. -
niels bohr
Won the nobel prize for his work on the structure of atoms. -
Hans Geiger
He created the first detector of alpha particles and other radiotions, He named it the geiger counter. -
Werner Heisenberg
Described atoms by formula connected to the frequncies of spectral lines. Proposed the principal of interdeterminincy. -
Erwin Schrodinger
Created wave mechanics for a model of an atom. -
james chadwick
Using alpha particles discovered a neutral atomic partical with a mass close to a proton. He discovered the neutron. -
ww2
world war two starts between asia and the united states. -
Invention of the hydrogen bomb
Was created for war purposes and tested in 1954.
