who wrote the atomic theory
summarise dalton's atomic theory
>all matter is made up of very small particles called atoms
>all atoms are indivisible
>atoms cannot be created or destroyed
who discovered the electron?
what are cathode rays?
streams of negatively charged particles called electrons
who named electrons?
what does thomson conclude about cathode rays?
since the cathod rays were attracted up towards the positive plate, they consisted of negatively charged particles
who did an oil drop exp?
what does the oil drop exp determine?
size of charge on electron
who discovered the nucleus
what is the plum pudding model?
sphere of positive charge with negative electrons embedded in it at random
who discovered the neutron?
who discovered the proton?
what did william crookes investigate?
cathode rays in vacuum tubes