-
500 BCE
the alchemists
frist to reforence and practice analyzing matter. they also coined term elements. documented chemical reactions. -
430 BCE
aristotle
Democritus of Abdera means indivisible. he believed atom's were uniform and solid hard. they could not be destroyed or would be constantly moving until stopped. -
427 BCE
plato
he carried on the atomic theory from so crate's. he introduced atomic theory were geometric form's served as atom's broke down mathematically into straggles. platonic solids. -
400 BCE
Democritus
he thought all matter consists of atom's which can not be further sub divided. atom's are extremally small. they are sold and indestructible. they are seaport form earth other by a void. -
Robert Boyle
the person who discovered that the volume of gas decreases with pressure and vice versa. -
Lavoisier
found that mass is conserved in chemical reaction. the end result is same mass as the begging martials. -
john Dalton
his theory was relative weights of ultimate particles of body and it was are markable success. made billiard ball modal or solid sphere modal -
Dmitri Mendeleev
made first periodic table. -
the curies
the ray she theorized, came from the element's tombic structure. in 1902 they announced that they produced a decigram of pure radium. showing existence of unquiet chemical element. -
J.J.Thoomson
proposed a modal of the atom as a sphere of positive matter with electron's positives based on electrostatic forces. he also design the "plum pudding" modal -
albert Einstein
he helped revolutionize all since through the use of statistics and probability. -
Robert Millikan
charge of a single electron. he measered the curse of charged water droplets i an electicfild. -
Ernest Rutherford
devolved starter of alpha ray's in structure of nucleus. it's how you find and identify alpha particles as helium nuclide. when fired in to gas atom's it is delectated some time's with would suggest a positive charge. -
Neils Bohr
his model was very different from pervious modals. he used number in term's of positive value. the proton and neutron are surround by electron. he also design the solar system modal. -
Henry G.J Moseley
the frequencies are proportional to the square's of whole # plus a constant. known as Moseley's law concerning atomic #. -
Werner Heisenberg
his theory and application's results in discovery of all tropic forms of hydrogen. -
electon cloud madle
Erwin Schrodinger made it.
