Atomic History Quiz

What experiment led to the discovery of the electron?

• Photosynthesis experiment

• Cathode ray tube experiment

• Baking soda and vinegar experiment

• Pendulum experiment

Who discovered the electron ?

• Isaac Newton, 1666

• Marie Curie, 1905

• Albert Einstein, 1901

• J.J. Thomson, 1897

How did Thompson know the electron was negatively charged?

• The ray bent to the negatively charged plate

• The ray bent towards the positively charged plate

• The ray went straight

Thompson believed that electrons and protons were all mixed together in a theoretical model of the atom called

• The Bohr Model

• The Nuclear Atom

• The Plumb Pudding model

• The Atom marble model

Using the oil drop experiment, Milikan discovered that the charge of an electron was

• • +1.6 x 10^-19 C

• +2.4 x 10^-19 C

• -1.6 x 10^-19 C

• 0 C

Shooting alpha particles at thin gold foil Rutherford saw two things

• most of the time the beam went straight through

• the foil began to melt

• sometimes the positively charged Alpha particles would be deflected

• suspended oil droplets

What did Rutherford's Gold Foil Experiment reveal about the structure of the atom?

• Atoms have no nucleus at all.

• Atoms have a negatively charged nucleus at the center.

• Although mostly empty, atoms have a small, dense, positively charged nucleus at the center.

• Atoms have a large, empty nucleus at the center.

Who discovered the neutron and in what year?

• Albert Einstein, 1935

• James Chadwick, 1932

• Marie Curie, 1940

• Isaac Newton, 1920

What is the charge of a neutron?

• Neutral

• Positive

• Negative

• Zero

How did the neutron contribute to the chain reaction in an atomic bomb

• Neutrons would ricochet off of the nucleus

• Neutrons would deflect electrons

• Neutrons were not repelled by the positive nucleus and would cause a chain reaction of more neutrons colliding into more atoms

• The positive neutrons would change the protons into becoming neutrons