the atomic therory project

democritus's atomic theory

460

Matter is composed of empty space through which atoms move. Atoms are solid, homogeneous, indestructible, and invisible. Diffrent kinds of atoms have different sizes and shapes. The different properties of matter are due to the size, shape, and movement of atoms. Apparent changes in matter result from changes in the atoms themselves

dalton's atomic theory

Oct 9, 1803

All matter is composed of extremely small particles called atoms. All atoms of a given element are identical, having the same size, mass, and chemical properties. Atoms of a specific element aare diffrent from other elements. Atoms can't be created, divided into smaller particles, or destroyed. Different atoms combine in simple wholenumbers ratios to form compounds. In a chemical reaction, atoms are separated, combined, or rearranged.

JJ Thomson's atomic theory

Oct 9, 1897

Founded the electron

albert einstein's atomic theory

Oct 9, 1905

published his famous equation E=mc 2

ernast ruthford's atomic theory

Oct 9, 1911

Gold foil experiment which proves that atoms are mostly empty space and a positivly charged nucleous

Aristotle's atomic theory

Mar 2, 2022

Aristotle belived that an atom was fire, water, earth, and fire