Answer:
![\boxed {\boxed {\sf Protons \ and \ neutrons }}](https://img.qammunity.org/2021/formulas/biology/high-school/v3443mmodqub0s3qs6h3dq5rs31crf7r6c.png)
Step-by-step explanation:
In an atom, there is a dense center known as the nucleus. It is made up of two subatomic particles: protons and neutrons. The protons have a positive charge and the neutrons have no charge, so overall the nucleus is positively charged.
The third subatomic particles, negatively charged electrons, are located around the nucleus in a cloud.
The particles in the nucleus are
.