4-2 Flashcard on Atomic Structure

Front

What are the three main types of subatomic particles? Options: Electrons, Protons, Neutrons, Electrons, Neutrons, Photons, Protons, Neutrons, Quarks

Back

Electrons, Protons, Neutrons

Front

What did J.J. Thomson discover in 1897? Options: The proton, The electron, The nucleus

Back

The electron

Front

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

Back

Atoms are mostly empty space.

Front

What charge do electrons carry?

Back

Negative

Front

What did Robert A. Millikan's oil-drop experiment measure? Options: The mass of protons, The charge of electrons, The size of the nucleus

Back

The charge of electrons

Front

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

Back

1/1840

Front

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

Back

It is tiny and dense.

Front

What are protons?

Back

Positively charged particles

Front

What is the role of neutrons in an atom?

Back

To provide mass without charge

Front

Which model of the atom did J.J. Thomson propose? Options: Plum-Pudding Model, Nuclear Model, Quantum Model

Back

Plum-Pudding Model