Strong Nuclear Forces: Teacher Answer Key
1.	What three particles make up an atom and what are the electrical charges of the
three particles?
Protons, neutrons and electrons. Protons have a positive (+) charge. Neutrons have a
neutral charge (0). Electrons have a negative charge {-).
2.	Try placing the like poles of two magnets together. What happens? How might protons
react in a nucleus?
The magnets repel due to the electromagnetic forces causing like poles/charges to
repel. Electromagnetic forces cause protons to repel.
3.	Hypothesize or explain how the nucleus of an atom is held together. Answers will vary.
4.	Based on what you learned, do you agree with your response to question 3? Explain
your answer. Answers will vary.
Environmental Protection RadTown Radioactive Atom Activity Set	EPA 402-B-19-030
* mA9encv	https://www.EPA.gov/RadTown/Activitv-3-Strong-Nuclear-Forces

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