-
this time line is about atomic theory.
-
he was a student of socrates and made observations. he theorized that everything is made of small indivisible particles called "atomos".
-
john dalton made observations called dalton's potulates. he theorized three things, everything made of atoms, atoms can't be broken down (solid sphere), atoms of each element are unique.
-
he made the cathode ray tube experiment. he theorized that there are electrons, plum pudding model or known as the choc. chip cookie model.
-
he did the gold foil experiment, atoms mostly empty space w/ small, positive, dense nucleus.
-
he made the bohr model and the electrons energy levels.
-
many scientists contributed and they concluded that electron, ion, isotopes, and that there is a uncertainty principle.
