Atomic History and Forces

Which is the correct order of scientists based on their contribution to atomic structure?

• Rutherford, Dalton, Thomson, Bohr

• Bohr, Thomson, Rutherford, Dalton

• Dalton, Bohr, Thomson, Rutherford

• Dalton, Thomson, Rutherford, Bohr

Which scientist came up with the "5 atomic postulates" while working with gases?

• Democritus

• Bohr

• Dalton

• Thomson

What was JJ Thomson's major contribution to atomic structure?

• He discovered neutrons

• He discovered electrons

• He discovered protons

• He discovered quarks

What was JJ Thomson's evidence to support his claim that negative electrons exist in the atom?

• The negative end of a magnet repelled the cathode ray

• The positive end of a magnet repelled the cathode ray

• Alpha particles were repelling the cathode ray

• Alpha particles were attracting the cathode ray

Which scientist's model of the atom was the Plum Pudding Model?

• Bohr

• Rutherford

• Dalton

• Thomson

What was Rutherford's famous experiment called?

• Oil Drop Experiment

• Cathode Ray Tube

• Gold Foil Experiment

• Planetary Model Experiment

Which of the following was/were Rutherford's claim(s) based on his experiment?

• There's a negative nucleus in the atom

• There's a positive nucleus in the atom

• Most of the atom is empty space

• Most of the atom is filled with electrons

What evidence supported that the nucleus was made of positively charged particles?

• Positive alpha particles were deflecting off the nucleus

• Positive alpha particles were attracting to the nucleus

• Negative alpha particles were deflecting off the nucleus

• Negative alpha particles were attracting to the nucleus

What evidence supported the claim that the atom is mostly empty space?

• Most of the alpha particles were deflected in other directions

• Most of the alpha particles were passing straight through the gold foil

• Most of the alpha particles were being absorbed by the gold foil

• Most of the alpha particles were deflected straight back at the source

The paddle wheel moving in the Crooke's Tube when electricity passed through it supported what claim?

• Protons are very light

• Electrons have no mass

• Electrons have mass

• Neutrons have no mass