Rutherford hypothesizes atomic nucleus
- 1. Who proposed the model of the atomic nucleus?
A) Niels Bohr
B) Marie Curie
C) Ernest Rutherford
D) J.J. Thomson
- 2. In Rutherford's model, most of the atom's mass is concentrated in the _________.
A) nucleus
B) valence electrons
C) orbital shells
D) electron cloud
- 3. Which experiment led Rutherford to propose the atomic nucleus?
A) Cathode ray tube experiment
B) Oil drop experiment
C) Gold foil experiment
D) Photoelectric effect experiment
- 4. The nucleus of an atom contains _________.
A) electrons and positrons
B) quarks and leptons
C) photons and neutrinos
D) protons and neutrons
- 5. What does the number of protons in the nucleus determine for an element?
A) valence electrons
B) atomic mass
C) atomic number
D) isotopic mass
- 6. The stability of a nucleus is influenced by the balance between ________ and ________.
A) centrifugal force, frictional force
B) gravity, weak nuclear force
C) electric force, magnetic force
D) strong nuclear force, electromagnetic force
- 7. Which subatomic particle is not found in the nucleus according to Rutherford's model?
A) protons
B) neutrons
C) electrons
D) quarks
- 8. The total number of protons and neutrons in the nucleus is referred to as the ________ number.
A) charge
B) atomic
C) elemental
D) mass
- 9. What is the process by which a nucleus splits into smaller fragments called?
A) beta decay
B) nuclear fusion
C) nuclear fission
D) alpha decay
- 10. Which nuclear reaction powers the sun and other stars?
A) beta decay
B) nuclear fusion
C) alpha decay
D) nuclear fission
- 11. The concept of isotopes can be explained by the presence of _________ in the nucleus.
A) antiprotons
B) muons
C) positrons
D) neutrons
- 12. What properties of an atom are determined by the arrangement of electrons in the electron cloud?
A) nuclear properties
B) mass properties
C) chemical properties
D) thermal properties
- 13. Which type of radiation is stopped by a thin sheet of paper?
A) alpha
B) beta
C) gamma
D) neutron
|