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The half-life - H.W4

Quiz by Huda Obied

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21 questions
Show answers
  • Q1
    What is the half-life of an isotope?
    The time it takes for an isotope to become stable
    The time it takes for the radiation to be absorbed
    The total time for all nuclei to decay
    The time taken for half the nuclei of that isotope in any sample to decay
    60s
  • Q2
    Which type of radiation is most commonly used in household smoke alarms?
    X-rays
    Alpha particles
    Beta particles
    Gamma rays
    60s
  • Q3
    What safety precaution should be taken to minimize exposure to ionizing radiation?
    Increase the exposure time
    Increase the distance between the source and living tissue
    Reduce the amount of shielding used
    Handle radioactive materials in enclosed spaces only
    60s
  • Q4
    How does the type of radiation emitted by an isotope influence its use in medical applications?
    Alpha particles are preferred for all medical applications
    All types of radiation have the same effects and penetration
    Only gamma rays are used in medicine
    Different types of radiation have varying penetration abilities and biological effects
    60s
  • Q5
    What is a common application of gamma rays in healthcare?
    Heating food
    Monitoring smoke levels in alarms
    Measuring material thickness
    Diagnosis and treatment of cancer
    60s
  • Q6
    What effect can ionizing radiation have on living organisms?
    Enhanced immunity to diseases
    Cell death, mutations, and cancer
    Increased growth and reproduction
    No effect on cells
    60s
  • Q7
    What is the significance of the half-life in the context of radioactive waste management?
    It helps determine how long the waste remains hazardous and when it can be safely stored
    It determines the color of the radiation
    It indicates the total amount of radiation produced
    It shows the age of the radioactive material
    60s
  • Q8
    In what way is radiation used to sterilize medical equipment?
    Gamma rays are used to kill bacteria and microorganisms
    Beta particles are used for enhanced visibility
    Alpha particles are used to disinfect surfaces
    X-rays are used to check for equipment faults
    60s
  • Q9
    What method is commonly used to ensure the safe storage of radioactive materials?
    Increasing exposure time to ensure decay
    Storing them in open containers
    Keeping them near living tissue
    Using shielding to absorb radiation
    60s
  • Q10
    Why is background radiation not included when calculating the half-life of isotopes?
    Background radiation is constant and does not affect the decay of a specific isotope
    It is irrelevant for radiation detection
    It complicates the calculation without providing useful information
    It only affects alpha emissions
    60s
  • Q11
    What is a necessary safety precaution when working with ionizing radiation?
    Reducing exposure time
    Storing radiation sources in water
    Keeping all radiation sources in direct sunlight
    Increasing exposure time
    60s
  • Q12
    Why is it important to use shielding when working with radioactive materials?
    To increase the radiation levels
    To absorb radiation and protect living tissue
    To amplify the effects of radiation
    To reflect radiation back to the source
    60s
  • Q13
    Which of the following factors does NOT affect the half-life of a radioactive isotope?
    Temperature
    Type of isotope
    Pressure
    Chemical state
    60s
  • Q14
    What is the definition of half-life?
    The time it takes for a substance to reach a stable state.
    The time it takes for a substance to completely decay.
    The time required for half of the substance to decay or reduce to half its initial amount.
    The time it takes for a substance to double its amount.
    60s
  • Q15
    If a scientist starts with 80 grams of a radioactive substance, how much will remain after two half-lives?
    20 grams
    60 grams
    40 grams
    10 grams
    60s

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