4-2 Quiz on Atomic Structure

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What are the three main types of subatomic particles?

• Electrons, Protons, Neutrons
• Electrons, Neutrons, Photons
• Protons, Neutrons, Quarks

What did J.J. Thomson discover in 1897?

• The proton
• The electron
• The nucleus

What was the main conclusion of Rutherford's Gold-Foil Experiment?

• Atoms are solid and indivisible
• Atoms are mostly empty space
• Electrons are evenly distributed

What charge do electrons carry?

• Positive
• Negative
• Neutral

What did Robert A. Millikan's oil-drop experiment measure?

• The mass of protons
• The charge of electrons
• The size of the nucleus

What is the mass of an electron compared to a hydrogen atom?

• Equal
• 1/1840
• 1/1000

What did Rutherford's model of the atom propose about the nucleus?

• It is large and spread out
• It is tiny and dense
• It contains only neutrons

What are protons?

• Negatively charged particles
• Positively charged particles
• Neutral particles

What is the role of neutrons in an atom?

• To carry a positive charge
• To balance the charge of protons
• To provide mass without charge