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