I Put particles suspended in a liquid and used a mathematical method to determine their random Movements

In 1808 I developed the theory that states:
1) All matter is made of atoms.
2) Atoms are indivisible and indestructible.
3) Compounds are formed by a combination of two or more different kinds of atoms.

I discovered the electron and determined the charge to mass ratio be 1.76 x 10^8 c/gram. I also PROPOSED the negatively charged electron.

In 1909 I deduced the charge of electrons to be -1.60 x to^-19 C with the oil drop experiment

I Was best known for discovering the positive nucleus and conducting the gold foil experiment which led to a specific theory.

I am known for Periodic Laws
and when elements are arranged in a specific way