A Level Chemistry Topic 1: Fundamental particles

Who was the first group that began the idea of an atom?

Greek Philosophers

What did Greek philosophers believe?

Matter was made up of a single continuous substance that produced the 4 elements fire water air and earth

Who were the 5 Men involved in the creation of our atom?

Robert Boyle, John Dalton, Henri Bec, JJ Thomson and Ernest Rutherford

What was Boyles contribution to the atom?

He proposed that some substances couldnt be made any simpler

What substances was Boyle referring to?

The chemical elements on our periodic table

In what year Did Boyle make his proposition?

1661

What did Dalton suggest?

Elements were composed of invisible atoms

Atoms of a particular element have the same mass whereas atoms of different elements have different masses

Atoms could not be destroyed.

What year did Dalton make his proposition??

1803

What did Henri Becquerel discover?

Radioactivity

What did radioactivity prove?

Particles could come from inside the atom

Who discovered the electron?

JJ Thomson

What was JJ Thomson’s contribution to the atom?

• He came up with the plum pudding model

  • He discovered the electron and showed that all the atoms have the same electron

What year did JJ Thomson make his contribution?

1897