Scientists 10.4.13

That there were four catagories earth wind fire water

Atoms made of small parts

First to conduct an experiment and first to use math to describe nature laws

Discovered atomic theory: all matter is indivisible indestructable atoms and there are elements and whole ratio combo

Dimitri mendeleev

Through experiments with a cathode ray tube, he discovered that particles are negatively charged and that plasma is the fourth phase of matter

Also using the cathode ray tube, he discovered the electron and came up with the plum pudding model

Using a sheet of gold foil he discovered that atoms have a posotively charged nucleus and are made up of mostly empty spaxe in which electrons move

Also used cathode ray tube to find the charge of the atomic nuclei, charge of an increased mass of an element, and concluded that the more protons an element has the heavier it is.