Which type of radiation has physical mass similar to alpha radiation but lacks an electrical charge?

• A. Beta
• B. Alpha
• C. Gamma
• D. Neutron

Answer: (D)

Neutron radiation is characterized by having physical mass similar to alpha radiation but without any electrical charge. Neutrons, like alpha particles, are relatively heavy compared to other forms of radiation. Alpha particles consist of two protons and two neutrons and carry a positive charge, while beta radiation consists of high-energy, high-speed electrons or positrons that carry a negative or positive charge, respectively.

Gamma radiation, on the other hand, is a form of electromagnetic radiation and has no mass or charge, making it fundamentally different in nature from both alpha particles and neutrons. Neutrons can penetrate materials more effectively than charged particles due to their neutral charge, which allows them to interact with atomic nuclei differently.

This distinction underscores the unique properties of neutron radiation and is critical in understanding the various types of radiation, their sources, and their interactions with matter.