Worksheet: Alpha Decay

In this worksheet, we will practice solving nuclear equations involving alpha decay.

Q1:

The following nuclear equation shows how an isotope of Neptunium decays to Protactinium: What is the value of 𝑚 in the equation?

Q2:

How many neutrons does an alpha particle have?

Q3:

How many protons does an alpha particle have?

Q4:

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

Q5:

When a nucleus emits an alpha particle, by how much does the mass number of the remaining nucleus decrease?

Q6:

What is the relative charge of an alpha particle?

Q7:

The following nuclear equation shows how an isotope of curium decays to plutonium via alpha decay: What are the values of 𝑝 and 𝑞 in the equation?

  • A 𝑝 = 3 , 𝑞 = 2
  • B 𝑝 = 4 , 𝑞 = 1
  • C 𝑝 = 3 , 𝑞 = 1
  • D 𝑝 = 4 , 𝑞 = 2
  • E 𝑝 = 5 , 𝑞 = 2

Q8:

The following nuclear equation shows how an isotope of uranium decays to thorium: What is the value of 𝑛 in the equation?

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