Question

which of the following statements is true?
a. individual atoms can be seen with the naked eye
b. electrons do not have mass
c. protons are located outside the nucleus of an atom
d. the nucleus of an atom contains protons and neutrons

Explanation:

• Option A: Atoms are extremely small and cannot be seen with the naked - eye.
• Option B: Electrons have a very small mass.
• Option C: Protons are located inside the nucleus of an atom.
• Option D: The nucleus of an atom contains protons and neutrons. This is a correct statement about atomic structure.

Answer:

D. The nucleus of an atom contains protons and neutrons.