Worksheet: Beta Decay

In this worksheet, we will practice how to solve nuclear equations involving beta decay.

Q1:

The nuclear equation 14670โ€“1CN+๏Š๐›ฝ shows how carbon decays to nitrogen via beta decay. What is the value of ๐‘› in the equation?

Q2:

The nuclear equation 3918390โ€“1ArK+๏‰๐›ฝ shows how argon decays to potassium via beta decay. What is the value of ๐‘š in the equation?

Q3:

Calcium-40 is created through the beta decay of potassium, as shown in the nuclear equation ๏Œ๏KCa+ยท40200โ€“1๐›ฝ What are the values of ๐‘ and ๐‘ž in the equation?

  • A ๐‘ = 4 0 , ๐‘ž = 1 9
  • B ๐‘ = 4 5 , ๐‘ž = 2 4
  • C ๐‘ = 3 9 , ๐‘ž = 1 9
  • D ๐‘ = 3 5 , ๐‘ž = 1 5
  • E ๐‘ = 4 0 , ๐‘ž = 2 0

Q4:

When an atomic nucleus emits a beta particle, how much does the atomic number of the remaining nucleus change by?

Q5:

What is the relative charge of a beta particle?

Q6:

When an atomic nucleus emits a beta particle, how much does the mass number of the remaining nucleus change by?

Q7:

The graph shows an isotope of thallium undergoing beta decay. The number of protons of the isotope is shown on the ๐‘ฅ-axis, and the number of neutrons of the isotope is shown on the ๐‘ฆ-axis.

What isotope of thallium does the graph show?

  • AThallium-212
  • BThallium-211
  • CThallium-210
  • DThallium-209
  • EThallium-208

What isotope does the thallium become?

  • ALead-208
  • BLead-211
  • CLead-209
  • DLead-210
  • ELead-212

Q8:

Element Thallium Lead Bismuth Polonium Astatine Radon Francium
Number of Protons 81 82 83 84 85 86 87

Bismuth can undergo beta decay. Which of the elements listed in the table does a bismuth nucleus become when it undergoes beta decay?

  • ARadon
  • BAstatine
  • CPolonium
  • DFrancium
  • EThallium

Q9:

Which of the following statements correctly describes the process of beta decay?

  • AIf an unstable nucleus has too many nucleons, 2 protons and 2 neutrons may be ejected from the nucleus.
  • BIf an unstable nucleus has too many protons, a proton may decay into a neutron, releasing a high-energy electron from the nucleus.
  • CIf an unstable nucleus has too many neutrons, one or more neutrons will be ejected from the nucleus.
  • DIf an unstable nucleus has too many neutrons, a neutron may decay into a proton, releasing a high-energy electron from the nucleus.

Q10:

Which of the following is the correct symbol for a beta particle?

  • A ๐œ‹
  • B ๐›ฝ
  • C ๐‘ƒ
  • D ๐ต
  • E ๐‘

Q11:

The diagram shows beta decay of beryllium-10. What isotope is produced in this process?

  • ABeryllium-10
  • BLithium-7
  • CBoron-11
  • DBoron-10
  • EBeryllium-9

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