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