Atomic Theory Quiz

Who proposed that all atoms of a given element were exactly alike and that atoms of different elements could join to form compounds?

• Democritus

• Ernest Rutherford

• JJ Thompson

• John Dalton

Which scientist conducted the cathode ray tube experiment and suggested that atoms could be divided into smaller parts?

• Democritus

• Ernest Rutherford

• JJ Thompson

• John Dalton

What did JJ Thompson call the negative particles he discovered in his cathode ray experiment?

• Positrons

• Neutrons

• Electrons

• Protons

What model did JJ Thompson develop to explain the structure of the atom?

• Plum Pudding Model

• Planetary Model

• Bohr Model

• Nuclear Model

Who proposed that most of the mass of the atom was concentrated at the atom's center?

• Democritus

• Ernest Rutherford

• JJ Thompson

• John Dalton

What experiment did Ernest Rutherford conduct to test the distribution of positive charge in the atom?

• Alpha Particle Experiment

• Electron Cloud Experiment

• Cathode Ray Tube Experiment

• Gold Foil Experiment

What did Ernest Rutherford call the positively charged dense core of the atom?

• Nucleus

• Proton

• Neutron

• Electron

In the current model of the atom, where is the nucleus located?

• Attached to the protons

• In the center of the atom

• At the edge of the atom

• Surrounded by electrons

What are the subatomic particles that contain negative charges?

• Neutrons

• Positrons

• Protons

• Electrons

What did Democritus suggest the universe is made up of?

• Particles

• Molecules

• Atoms

• Elements