-
440 BCE
"Atoms constantly move." - Democritus
Democritus -
440 BCE
Atoms are “uncuttable." - Democritus
Democritus -
440 BCE
"Atoms are small, hard particles." - Democritus
Democritus -
"All substances are made of atoms." - Democritus
Democritus -
"Atoms of the same element are exactly alike." - John Dalton
John Dalton -
"Atoms of different elements are different." - John Dalton
John Dalton -
"He conducted the cathode-ray tube experiment." - JJ Thomson
J.J. Thomson -
"His theory of the atomic structure lead to the “plum-pudding” model." - Rutherford & Thomson
Rutherford and Thomson -
"He conducted the gold foil experiment." - Hans Geiger & Ernest Marsden
Hans Geiger and Ernest Marsden -
"Atoms contain mostly empty space." - Ernest Rutherford
Ernest Rutherford -
"Electrons move in empty space in the atom." - Ernest Rutherford
Rutherford -
"Most of an atom’s mass is in the nucleus." - Rutherford
Rutherford -
"Electron paths cannot be predicted." - Bohr
Bohr -
"Electrons jump between levels from path to path." - Bohr
Bohr -
"Electrons travel in definite paths." - Bohr
Bohr -
"Elements combine in specific proportions." - Louis de Brogile
Louis de Brogile -
"Electrons are found in electron clouds, not paths." - Erwin Schrödinger and Werner Heisenberg
Erwin Schrödinger and Werner Heisenberg