Which subatomic particles are found in the nucleus of an atom of beryllium?

• A. Neutrons and electrons
• B. Protons and electrons
• C. Only protons
• D. Protons and neutrons

Answer: (D)

Verified step by step guidance

1. Recall that an atom consists of three main subatomic particles: protons, neutrons, and electrons.
2. Understand that the nucleus of an atom contains only protons and neutrons, which are tightly bound together.
3. Recognize that electrons orbit the nucleus in electron clouds or shells and are not found inside the nucleus.
4. Apply this knowledge specifically to beryllium, which, like all atoms, has protons and neutrons in its nucleus.
5. Therefore, the subatomic particles found in the nucleus of a beryllium atom are protons and neutrons.