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Democritus
He proposed the concept of the atoms. -
Law of conservation of mass
States that mass is neither created nor destroyed in any ordinary chemical reaction. -
Antoine Lavoiser
He discovered the role oxygen plays in combustion. He also discovered the phlogiston theory. -
John Dalton
The atomic theory was a break through in our whelers traveling of matter. -
electron cloud model
It represents a sort of history of where the electron has probably been and where it is likely to be going. -
J.J. Thomson
He discovered the earliest theoretical description of inner structure of atoms. -
Cathode ray tube
It's a vaccum tube containing an electron gun and a fluorescent screen used to view images. -
Ernest Rutherford
He is best known for the names alpha,beta, and gamma rays to classify them. In 1903 he deflected alpha rays with both electric and magnetic fields. In 1917 he passed alpha particles through a gas of nitrogen and occasionally observed scintillation of hydrogen impacting on his screen. -
Plum pudding model
Ratio of an electron to be 1.759x108 coulombs/g. -
Rutherford Model
He conducted a famous experiment where he made gold foil with alpha particles. -
Gold foil experiment
You would fire a beam of alpha particles through a piece of foil and observe the location at which the particles landed on the screen. -
Neils Bohr
He discovered the atomic model. He described the nucleus as a compound structure. -
Henry Mosely
He arranged the periodic table according to atomic number,not atomic mass. Determined the charges on the nuclei of most atoms. -
Bohr planetary model
Are able to explain the stability of atoms,as well as the emission spectrum of hydrogen. -
Erwin Schrodinger
He contributed papers of the scientific literature. He discovered wave mechanics. -
Robert Millikan
He designed the fine tunung of experiments,proved the implications for the atomic theory. He also discovered the electron and it's charge. -
James Chadwick
He discovered the neutron. -
Quantum mechanical model
Explains the behavior of particles in the atomic and subatomic realms.
