Quiz  /  Mass Defect Class 11 MCQ Questions With Answers

  • 1. 
    What happens to the extra .029 of matter that is left over when hydrogen is fused into helium?

  • nothing it just stays in the star
  • released as energy
  • there is no left over matter
  • stars are dumb

  • 2. 
    Main sequence stars of all masses are fusing what element to make helium

  • hydrogen
  • iron
  • gold
  • beryllium

  • 3. 
    The nucleus of an atom is made of

  • electrons and protons
  • electrons and neutrons
  • protons and neutrons
  • empty space

  • 4. 
    The atomic mass of Hydrogen is

  • 1.008
  • 4.003
  • 15.999
  • 8.001

  • 5. 
    The Carbon-12 atom is used by physicists to establish

  • the charge on an electron.
  • the low point on a mass defect graph.
  • the gram and kilogram units.
  • the atomic mass unit.

  • 6. 
    Choose the answer that correctly describes Iron.

  • Iron has a heavier atom than carbon and a heavier proton also.
  • Iron has a heavier atom than gold but a lighter proton
  • Iron has a lighter atom than lead and a lighter proton also.
  • All three statements are equally correct.

  • 7. 
    The mass of this particle is so small that it is not counted.

  • proton
  • electron
  • neutron
  • quark

  • 8. 
    Protons and neutrons is so small, they are assigned a mass of 1 in these units

  • grams
  • milligrams
  • amu (atomic mass unit)
  • mass number

  • 9. 
    Subatomic particle with a charge of 0

  • neutron
  • proton
  • electron
  • quark

  • 10. 
    The atomic mass of Helium is

  • 1.008
  • 4.003
  • 15.999
  • 9.001
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