Worksheet: Radioactive Decay Chains

In this worksheet, we will practice determining the products of radioactive decay chains and identifying the type of radioactive decay from the decay products.

Q1:

Astatine-218 undergoes beta decay to radon-218. Radon-218 undergoes alpha decay to polonium-214. This is shown in the following nuclear equation.

A t R n + P o + + 2 1 8 𝛽 𝛽 𝛼

What is the value of 𝑟 in the equation?

What is the value of 𝑠 in the equation?

Q2:

Which type of nuclear radiation has no mass?

  • ABeta particles
  • BGamma rays
  • CNeutrons
  • DAlpha particles

Q3:

The diagram shows a beryllium-11 nucleus undergoing two-step radioactive decay. Red circles represent protons, gray circles represent neutrons, and blue circles represent electrons. What isotope is produced through this reaction?

  • ABeryllium-11
  • BLithium-7
  • CBoron-11
  • DCarbon-12
  • EBeryllium-9

Q4:

The diagram shows an unstable nucleus undergoing radioactive decay. Red circles represent protons, grey circles represent neutrons, and blue circles represent electrons. What type of radioactive decay does this diagram show?