Which statement correctly describes the location of protons and electrons in a helium atom?

• A. Protons are found outside the nucleus, and electrons are located inside the nucleus.
• B. Protons and electrons are evenly distributed throughout the atom.
• C. Both protons and electrons are located in the nucleus of the atom.
• D. Protons are located in the nucleus, while electrons are found outside the nucleus in energy levels.

Answer: (D)

Verified step by step guidance

1. Recall the basic structure of an atom: it consists of a nucleus and surrounding regions called energy levels or electron shells.
2. Understand that protons are positively charged particles and are located inside the nucleus at the center of the atom.
3. Recognize that electrons are negatively charged particles and are found outside the nucleus, moving in defined energy levels or orbitals.
4. Note that neutrons (not mentioned here) are also located in the nucleus along with protons, but electrons are never inside the nucleus.
5. Therefore, the correct description is that protons are located in the nucleus, while electrons are found outside the nucleus in energy levels.