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