Atomic Theory Review

Who composed a six-part atomic theory based on the ideas of Democritus?

• Rutherford

• Thomson

• Dalton

• Aristotle

Who discovered the nucleus by conducting the gold foil experiment?

• Rutherford

• Dalton

• Crookes

• Chadwick

Who found the charge and mass of an electron by conducting the oil-drop experiment?

• Aristotle

• Millikan

• Crookes

• Rutherford

Who thought that all matter was composed of four elements - earth, fire, water, and air?

• Dalton

• Democritus

• Aristotle

• Millikan

Who proposed the plum pudding model of the atom?

• Thomson

• Rutherford

• Crookes

• Moseley

Who discovered that each element has a different number of protons?

• Dalton

• Rutherford

• Moseley

• Millikan

Who first thought that all matter was composed of small particles called atoms?

• Dalton

• Democritus

• Aristotle

• Thomson

Who discovered the neutron?

• Chadwick

• Moseley

• Millikan

• Crookes

Who discovered a stream of negative particles when working with a cathode ray tube?

• Millikan

• Crookes

• Thomson

• Rutherford

Who discovered that the mass of an electron was less than the mass of a hydrogen atom, and is therefore credited with discovering the electron?

• Dalton

• Moseley

• Crookes

• Thomson