Answer the following question given this paragraph: 

Summary Subatomic particles of the nucleus (protons and neutrons) are called nucleons. Anuclide is an atom with a particular number of protons and neutrons. An unstable nucleus that decays spontaneously is radioactive, and its emissions are collectively called radioactivity. Isotopes that emit radiation are Saylor URL: http://www. saylor. org/books.


Q: What are the subatomic particles of the nucleus called?

 Choices:

- cores

- eukaryotes

- protons

- nucleons

A:
nucleons
