Final answer:
The nucleus of an atom contains two types of particles: protons and neutrons. Protons provide a positive charge and determine the atomic number, while neutrons add mass and provide stability. Electrons orbit the nucleus but are not found within it.
Explanation:
Particles in the Nucleus of an Atom
The nucleus of an atom is the central core where the majority of an atom's mass is concentrated. It contains two types of subatomic particles:
- Protons: These are positively charged particles. The number of protons in the nucleus determines the atomic number of an element and its identity.
- Neutrons: These particles have no charge (they are neutral) and play a crucial role in adding mass to the nucleus. Neutrons contribute to the stability of the atom.
Electrons, which are negatively charged, orbit around the nucleus but are not found inside it. Therefore, the correct answer to the question is protons and neutrons.
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