American Chemical Society (ACS) Chemistry Practice Exam

What type of radiation is uncharged?

α-particles β-particles γ-rays All of the above

Correct Answer:

γ-rays

Explanation:

Gamma rays are a form of electromagnetic radiation that is uncharged and has no mass. This differentiates them from alpha and beta particles. Alpha particles are helium nuclei, consisting of two protons and two neutrons, making them positively charged. Beta particles, which are high-energy, high-speed electrons (or positrons), carry a negative or positive charge, respectively. In contrast, gamma rays do not possess any charge or mass, which allows them to penetrate materials more easily compared to the other forms of radiation. This characteristic makes gamma radiation particularly significant in various applications such as medical imaging and cancer treatment, where uncharged radiation can traverse tissues without being significantly deflected or absorbed.

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