Final answer:
The nucleus of an atom contains protons, which are positively charged, and neutrons, which carry no charge. Electrons orbit around the nucleus.
Step-by-step explanation:
The two subatomic particles located in the nucleus of an atom are protons and neutrons. Protons are positively charged, while neutrons are neutral. These particles are held together in the nucleus by the strong nuclear force. Electrons, which are negatively charged, move around the nucleus in different energy levels or shells. The number of protons determines the atomic number and thus the identity of the element, so for instance, hydrogen has one proton, helium has two, and sodium has 11.