Science atomic theory

democritus

democritus

Matter is made up of atoms and moves through empty space. Atoms are solid, indivisible, and don’t change.

dalton

His model was that atoms couldn’t be created or destroyed and all atoms from the same element were identical. Also, chemical properties are rearrangements and compounds are two or more different elements.

Thomson

He discovered electrons and his model is commonly known as “plum pudding”

Rutherford

His model shows that atoms have a nucleus. Inside the nucleus are particles with positive charge. Electrons also rotate around the nucleus.

Bohr

His model shows that electrons orbit around the nucleus and that electrons have the same amount of energy. This model is the new atomic model that is used today.

cloud model

His model shows which electrons are most likely to be in an atom, arranged in a “cloud” like shape. It is used for describing the behavior of electrons.

James Chadwick

helped to prove Rutherford’s theory. He discovered another particle inside the nucleus by shooting radiation at Beryllium. He detected radiation other than protons, and knew there must be another particle.

Schrodinger and Heinsburg

Erwin Schrodinger was an Austrian Physicist who helped to discover the cloud model, a model that places electrons in their most likely spot. It is a cloud because the electron’s location isn’t known.