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460
DEMOCRITUS
What: thought there were atoms with specific types of proprities and they could not be broken down or split.
How: he just used a theory close to the one we use now. -
500
ARISTOTLE
What: he didn't think there was a limit to dividing matter.
How: He used the for elements of earth, water ,air and fire to show dividings that could go on for ever. -
Isaac Newton
How: Newton created a theory of light, the three laws of motion and created a mechanical universe with small, solid masses in motion.
What:Newton thought atoms are held together with attractions, otherwise known as forces. -
JOHN DALTON
What:concluded that a gas consist of individual particals.
How: He used wooden balls to show diffrent atoms with diffrent masses. His theory explains elements in a compound always join together in the same ways and all matter is created with individual particals -
JJ THOMSON
What: used an electric current to learn about atoms and used a fraction 1/2000 for the masses of hydrogen.
How: Used a device with seald glass in the center with a positive and negative charged plates and when electric current went to both plates the air in the glass would glow green. -
NIELS BOHR
What:focoused on electron attractions and the atoms are the center peice.
How: He figured out a math equation to show the curtain distance between electrons that would circle the neutrons and protons in the center creating an atom -
ERNIST RUTHERFORD
What: waned to know what happens to alpha particals when passing through thin gold.
How:shot a beam of alpha particals at a thin sheet of gold and created flashes that showed the path of the scattered alpha particals -
HANTARO NAGAOKA
What: A center atom is circled with negitave electorns like the rings around saturn.
How: he show a current of electrons circling a positvely charged atom and his example was the rings around saturn. -
ERNIST MARSDEN
What: he was rutherfords student that tested the beam of alpha particals through the gold
How: he used rutherfords tequnecs and digrams to create the test. -
LOUIS DE BROGLIE
What: described the motion of moving particals that have some proprities of waves.
How: Uses mathmatical equations showing the waves of moving particals of the electrons. -
ERWIN SCHRODINGER
What: showed motion of electrons in atoms
How: he uses mathmatical equations to describe the motion of electrons in atoms and the work was know as the cloud. there was a clump of electrons and the higher on the clump it's easier to find the electrons from the atoms. -
JAMES CHADWICK
What: thought there was an existance of newtrons with no charge.
How: he uses negative electrons that spins around positive protons and neutral neutrons and creating no charge they are an atom.
