Final answer:
In an atom, the nucleus consists of protons and neutrons, while electrons orbit the nucleus. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge.
Step-by-step explanation:
In an atom, the nucleus consists of subatomic particles called protons and neutrons. Protons carry a positive charge, while neutrons have no charge and are considered neutral. On the other hand, electrons have a negative charge and orbit the nucleus. In an uncharged atom, the number of electrons orbiting the nucleus is equal to the number of protons, resulting in no net charge.