Question 12

Protons and neutrons are found in the nucleus of an atom.

The particles located in the nucleus of an atom are protons and neutrons, which together make up the atomic mass and determine the identity of the element.

A) Protons, only

This option is incorrect because it excludes neutrons, which are also present in the nucleus. While protons do reside in the nucleus, stating "only protons" fails to acknowledge the presence of neutrons, which are essential components of atomic structure.

B) Neutrons and electrons

This option is incorrect as it mistakenly includes electrons, which are not found in the nucleus. Electrons orbit the nucleus in electron shells and do not contribute to the nuclear composition of an atom.

C) Protons and neutrons

This option is correct because both protons and neutrons are indeed found in the nucleus of an atom. Protons carry a positive charge, while neutrons are neutral, and together they constitute the nucleus, influencing the atom's mass and stability.

D) Electrons, only

This option is incorrect since it only mentions electrons, which do not reside in the nucleus. Electrons exist in the surrounding electron cloud and play a role in chemical bonding and reactions, but they are not part of the nucleus.

Conclusion

The correct answer, "protons and neutrons," accurately reflects the contents of the nucleus, while all other options either misrepresent the composition or omit crucial particles. Understanding the structure of the atom is fundamental to grasping its behavior and interactions in chemistry and physics.