Worksheet: Nuclear Fusion

In this worksheet, we will practice how to describe the process of nuclear fusion and the advantages and disadvantages of nuclear fusion reactors.

Q1:

The diagram shows 2 helium nuclei fusing to form a larger nucleus. Red circles represent protons and gray circles represent neutrons.

How many protons are in the resulting nucleus?

How many neutrons are in the resulting nucleus?

What element is produced by this reaction?

  • ANitrogen
  • BHelium
  • CBoron
  • DBeryllium
  • ELithium

Q2:

The diagram shows 2 hydrogen nuclei fusing to form a different nucleus. What element does this reaction produce? Red circles represent protons and gray circles represent neutrons.

  • ATritium
  • BHelium
  • CLithium
  • DDeuterium
  • EHydrogen

Q3:

The diagram shows the nuclei of the three isotopes of hydrogen. Red circles represent protons and gray circles represent neutrons.

Isotope (b) is called deuterium. How many protons does deuterium have?

How many neutrons does deuterium have?

Which of the following is the correct element symbol of deuterium?

  • A21H
  • B20H
  • C12H
  • D31H
  • E11H

Isotope (c) is called tritium. How many protons does tritium have?

How many neutrons does tritium have?

Which of the following is the correct element symbol of tritium?

  • A31H
  • B42H
  • C21H
  • D30H
  • E13H

Q4:

The diagram shows 2 nuclei fusing. Red circles represent protons and gray circles represent neutrons.

How many protons are there in total before the reaction takes place?

How many neutrons are there in total before the reaction takes place?

How many protons are there in total after the reaction takes place?

How many neutrons are there in total after the reaction takes place?

  • A3
  • B4
  • C1
  • D2

Which element is the heaviest of the 2 nuclei before the reaction?

  • ALithium
  • BHelium
  • CTritium
  • DBeryllium
  • EBoron

How many helium nuclei does the reaction produce?

  • A2
  • B3
  • C4
  • D1

Q5:

Which three of the following are advantages of nuclear fusion reactors over nuclear fission reactors?

  1. Nuclear fusion reactors do not produce highly radioactive waste products that need to be stored for hundreds or thousands of years.
  2. The fuel for nuclear fusion, heavy hydrogen, is easily available in the world’s oceans.
  3. Nuclear fusion reactor technology has been used for decades, whereas nuclear fission reactor technology is still being developed.
  4. Nuclear fusion does not produce by-products that can be used for nuclear weapons.
  • Aa, b, d
  • Ba, c, d
  • Cb, c, d
  • Da, b, c

Q6:

The diagram shows 2 nuclei fusing to form a larger nucleus. Red circles represent protons and gray circles represent neutrons.

Name the heaviest element shown before the reaction takes place.

  • ABoron
  • BBeryllium
  • CLithium
  • DTritium
  • EHelium

What element is produced by this reaction?

  • AOxygen
  • BNitrogen
  • CCarbon
  • DBeryllium
  • EBoron

Q7:

The diagram shows 2 helium nuclei fusing. 3 new particles are produced by the reaction. Red circles represent protons and gray circles represent neutrons.

What is the heaviest element produced by this reaction?

  • AHydrogen
  • BBeryllium
  • CDeuterium
  • DLithium
  • EHelium

How many hydrogen nuclei are produced by this reaction?

Q8:

Which of the following is another name for deuterium?

  • AHelium
  • BTritium
  • CLight hydrogen
  • DHeavy hydrogen
  • EBig hydrogen

Q9:

Which two of the following elements release energy when two nuclei of each element undergo nuclear fusion?

  • Plutonium
  • Platinum
  • Hydrogen
  • Uranium
  • Helium
  • AUranium and hydrogen
  • BHelium and platinum
  • CUranium and plutonium
  • DPlutonium and helium
  • EHydrogen and helium

Q10:

Which of the following correctly describes the process of nuclear fusion?

  • AAn unstable nucleus ejects 2 protons and 2 neutrons, dropping to a lower energy state.
  • BThe nucleus of an atom is struck by a neutron, causing the nucleus to split into two smaller fragment nuclei and to release several neutrons.
  • CTwo small nuclei combine to form a larger nucleus.
  • DAn unstable nucleus emits an electron and one of the neutrons becomes a proton.
  • EThe nucleus of an atom splits without being struck by a neutron, resulting in two smaller nuclei and two or three high-speed neutrons.

Q11:

The following nuclear equation shows two nuclei fusing to form a larger nucleus: 7115Be+HB+energy.

What is the value of π‘Ÿ in this equation?

What is the value of 𝑠 in this equation?

Q12:

The following nuclear equation shows the fusion of 2 helium nuclei: 22421111He+HeHe+H+H+energy.

What is the value of 𝑝 in this equation?

What is the value of π‘ž in this equation?

Q13:

The following nuclear equation shows 2 hydrogen nuclei fusing to form a helium nucleus: 1121H+HHe+energyο‰οŠ.

What is the value of π‘š in this equation?

What is the value of 𝑛 in this equation?

Q14:

The diagram shows a nuclear fusion reaction. Which of the following is the correct nuclear equation for the shown reaction? Red circles represent protons and gray circles represent neutrons.

  • A43114242Li+HHe+He
  • B34114242Li+HHe+He
  • C43214242Be+HHe+He
  • D73114242N+HBe+Be
  • E43112222Li+HHe+He

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