atomic model timeling

Democritus

400 BCE

Democritus was an ancient greek philosopher he discovered the atom

Aristotle

384 BCE

Aristotle was a Greek philosopher who created the solar system model these models illustrate the relative positions and motions of the planets and moons in the solar system have been built for centuries.

Plato

347 BCE

Plato was an Athenian philospher hes most famous for his condribution is the theory of forms known by pure reason in which plato presents a solution to the problem of universals known as platonism.

Robert Boyle

1657

Robert was a philosopher who discovered the Robert Boyle law that the volume of a gas decreases with increasing pressure

The Alchemists

1669

The Alchemists discovered the 4 basic elements of nature air, fire, water, and earth

Lavoisier

1778

Lavoisier a French chemist discovered oxygen, nitrogen, carbon, and silicon.

John Dalton

1800

John Dalton was a English chemist, physicist, and meteorologist. He discovered the Billiard Ball Dalton thought atoms were the smallest particles of matter he envisioned them as solid, hard spheres like billiard balls, so he used wooden balls to model them.

Dmitri Mendeleev

1869

Dmitri was an russian chemist who discovered the periodic table and pyrocollodion and pycnometer

J.J. Thomson

1897

J.J. Thomson was a British physicist who created the plum pudding model the model shows that an atom has both a positive and negative charged medium soon after he discovered the charges an atom has he created the model he said that the positive charge was like the pudding with a negative charged mediums (the plum) inside of it.

Curies

1902

Marie Curie was a French-polish physicist she discovered radioactivity with her husband together, the radioactivity elements polonium and radium working with mineral pitchblende she combioned the developement of x-rays after her husbands death

Robert Millikan

1910

Robert discovered the elementary change and the formula for it.

Ernest Rutherford

1911

Ernest discovered many things but one of those many things that he discovered was the Ruthford model of an atom.

Neils Bohr

1913

Neils Bohr wasa Daish physicist who madefoundational contributions to understanding atomic structure and quantum theory.

Henry Moseley

1913

Henry discovered the relation between wave length and the atomic number also known as the Moseley law

Albert Einstein

1915

Albert was a theoretical physicist he discovered Einstein refrigerator and gas absorption heat pump

Werner Heisenberg

1925

Werner Heisenberg is a German theoretical physicist. He discovered the Electron Cloud Model that helps visualize most probable position of electrons in an atom. Currently one of the accepted model of the atom.