-
John Dalton discovered that all elements are created from indestructible particles called atoms which are different from other element's atoms.
-
Thompson discovered the electron.
-
Created the theory that atoms have a positvely charged nucleus and negatively charged particels that lie outside of it.
-
Discovereed that there are some properties of atoms that cannnot be defined.
-
Concluded that atoms are mostly empty space and have a positively vharged center called the nucles.
-
Hypotheesized that you cannot calculate a particle's position and velocity.
-
Chadwick discovered the neutron.
-
Democritus was the first do discver evidence of the atom.
