Question

PLEASE HELP!!! I need info regarding these guys and what they did to help with the discovery of atoms. Please ONLY ANSWER IF YOU KNOW!!!!!!!!!! I am doing an essay and need quite a bit of info.
Here are the guys I need to know about (you can choose one or two to focus on):
Democritus (400BC), John Dalton (early 1800s), J. J. Thomson (1898), Ernest Rutherford (1909), Niels Bohr (1913), Erwin Shrodinger (1930), and James Chadwick (1931).
Here are the main things I need to know:
Were there experiences in his life that led to his interest in science and the study of the atom?
His work on the atom and its contribution to the modern atomic model.
Which contributions are present in the modern atomic model and which were eventually disproven and thus are not part of the modern model.

Answer 1

Democritus was the one who had theorized that atoms make up everything and they are indivisible.
Dalton was the creator of the first actual atomic theory, most of his research was on gasses and meteorology.
Thompson was the original man who put together the plum pudding model in which Rutherford later proved wrong during his career.
Rutherford had discovered the nucleus within an atom. He had put together gold foil experiment.
Bohr had developed the idea of neutrons and electrons surrounding the nucleus. He was also the creator of the planetary model we now use to calculate electrons with.