-
400 BCE
Democritus
"Started" the atom. He is the one who originally thought about what the smallest thing is. His atomic model was a sphere. -
John Dalton
~English chemist
~physicist
~meteorologist
~atomic theory
~law of multiple proportions
~Dalton's Law
~color blindness -
JJ Thomson
~was an English physicist who discovered the electron
~plum-pudding model
~ the gold foil experiment with fellow physicist Ernest Rutherford
~the experiment consisted of shooting alpha particles at gold foil and recording their findings. Sometimes the alpha particle would go straight through with no problem. Other times, they would go in random directions. This led them to the conclusion that there was a lot of empty space in atoms. -
Ernest Rutherford
~discovered the proton
~Rutherford model
~atomic nucleus
He was known as the "father of the nucleus"
Awards: Nobel Prize in Chemistry, Franklin Medal, Copley Medal -
Niels Bohr
~made foundational contributions to understanding atomic structure and quantum theory in 1921
~Bohr Model -
Erwin Schrodinger
~Schrodinger Method in 1926
~Schrodinger Model
~Noble Prize in Physics, Max Planck Medal -
James Chadwick
~discovered the neutron
~English physicist
His atomic model positively charged nucleus surrounded by negatively charged electrons
This particle became known as the neutron
