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?

  • A๐‘=40, ๐‘ž=19
  • B๐‘=45, ๐‘ž=24
  • C๐‘=39, ๐‘ž=19
  • D๐‘=35, ๐‘ž=15
  • E๐‘=40, ๐‘ž=20

Q4:

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

  • Aโˆ’1
  • B+1
  • C0
  • Dโˆ’2
  • E+2

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:

ElementThalliumLeadBismuthPoloniumAstatineRadonFrancium
Number of Protons81828384858687

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?

  • A๐œ‹
  • B๐›ฝ
  • C๐‘ƒ
  • D๐ต
  • E๐‘

Q11:

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

  • ALithium-7
  • BBeryllium-10
  • CBoron-11
  • DBoron-10
  • EBeryllium-9

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