Quiz  /  Physics Class 11 MCQ Questions With Answers

  • 1. 
    Complete the nuclear equation and determine the type of decay that is occurring in this reaction.

  • alpha
  • beta
  • gamma
  • none

  • 2. 
    When does radioactive decay occur?

  • When the nucleus of an isotope is unstable
  • When the nucleus of an isotope is stable
  • When the electrons of an isotope are spinning
  • When the electrons of an isotope are shared with another isotope

  • 3. 
    The atomic number of a given element isequivalent to which of the following?

  • Proton number in the nucleus
  • Neutron number in the nucleus
  • Sum of the protons and neutrons in thenucleus
  • Sum of the protons, neutrons and electrons

  • 4. 
    TRUE or FALSE: gamma changes the atomic number.

  • True
  • False

  • 5. 
    What is a beta particle made of?

  • One proton
  • A helium particle
  • One electron
  • One proton and one neutron

  • 6. 
    Isotopes of the same element have different ____________.

  • numbers of protons
  • numbers of electrons
  • symbols
  • numbers of neutrons

  • 7. 
    What is the number of neutrons in Cesium?

  • 55 neutrons
  • 76 neutrons
  • 84 neutrons
  • 106 neutrons
  • 139 neutrons

  • 8. 
    What is the mass of an alpha particle?

  • 1
  • 2
  • 3
  • 4

  • 9. 
    Of the main types of radiation emitted from naturally radioactive isotopes, which is the hardest to block?

  • Alpha deca
  • Gamma Decay
  • Beta decay
  • They are all blocked using the same method

  • 10. 
    What kind of force holds the nucleus together?

  • Strong Nuclear Force
  • Weak Nuclear Force
  • Gravitational Force
  • Electromagnetic Force

  • 11. 
    How many protons does gold atom have?

  • 197
  • 79
  • 118
  • 276

  • 12. 
    What is the definition of an isotope?

  • An atom with different electron number to proton number
  • An atom with different proton number from neutron number
  • An atom with different number of protons from the periodic table
  • An atom with a different number of neutrons from the periodic table

  • 13. 
    Neutrons ......

  • has positive electric charge with equal magnitude to that of an electron.
  • has no net electric charge.
  • has negative electric charge.
  • orbiting the nucleus.

  • 14. 
    What is emitted during Alpha Radiation?

  • A helium nuclei.
  • A helium atom
  • Gamma Rays.
  • Positrons

  • 15. 
    What is emitted during Beta Radiation?

  • A high-energy Electron.
  • Protons.
  • Neutrons.
  • Nuclei

  • 16. 
    If there are 146 neutrons in 238U, how many neutronsare found in the nucleus of 235U?

  • 141
  • 143
  • 145
  • 147

  • 17. 
    Which of these processes describes a nuclear fusion reaction?

  • A nucleus absorbs energy to produce lighter nuclei.
  • A nucleus splits to produce energy and lighter nuclei
  • Two nuclei bind together to produce energy and heavier nuclei.
  • Two nuclei bind together to produce energy and a lighter nuclei.

  • 18. 
    What is radioactive decay?

  • The spontaneous breakdown of an atomic nucleus resulting in only energy release
  • The spontaneous breakdown of an atomic nucleus resulting in only matter release
  • The spontaneous breakdown of an atomic nucleus resulting in a release of energy and matter
  • The decay of the use of radios and the increased use of televisions.
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