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6. What charge is alpha?

  • 2
  • 2-
  • 2+
  • 4+

7. What does the 'm' mean in E=mc2

  • Total mass of Element
  • Mass lost during fission
  • Mass of atom
  • Mass gained during fussion

8. On a paper thickness guage, what will happen to the radiation if the sheet becomes thicker?

  • It will emit gamma radiation
  • It will decay
  • It will decrease
  • It will increase

9. What is the weight of an Electron?

  • 1/480
  • 1/1840
  • 1/849
  • 1/841

10. Why is food zapped with gamma last?

  • So that there's no microorgansims
  • So that other bacterium don't get in and multiply
  • So that the person won't be exposed to radiation
  • So that it decreases the chance of other microbes multiplying

11. What is the half-life of a radioisotope?

  • The time taken for half of all the atoms to decay
  • The time taken for the atoms to decay
  • Half of the time taken for the atoms to decay.
  • The amount of half the radiation to decay.

12. Beta and Gamma are...

  • More harmful than alpha
  • Penetrating
  • Highly penetrating
  • Highly ionising

13. Radioactivity is...

  • Stable
  • Sometimes random, sometimes predictable
  • Random
  • Predictable

14. What range (in air) does Beta have?

  • 10cm
  • 3mm
  • 1m
  • 3m

15. What happens when a radioactive nucleus emits alpha or beta?

  • The number of protons and neutrons changes
  • The number of electrons changes
  • It makes and new element
  • It changes the amount of radioactivity in the atom

16. What do film badges do?

  • Detects radiation
  • Shield people who work with radiation
  • Monitor radiation
  • Treat radiation sickness

17. What does the activity of a radioactive sample depend on?

  • The half-life of the element
  • How unstable the nucleus is
  • Number of unstable nuclei present
  • The number of protons and neutrons in the nucleus

18. What do PET scans for active cancers detect?

  • What type of cancer it is
  • Increased Glucose
  • Starch
  • Gamma radiation

19. What triggers smoke alarms?

  • Carbon particles turn the alpha source into a He atom
  • Alpha turns into Carbon
  • The Carbon particles fuse with Helium
  • The alpha reacts with Carbon

20. What is gamma radiation?

  • An electromagnetic wave
  • An isotope
  • An ionising wave
  • A radioactive atom