what does the term \alpha particles\ refer to in the context of the gold foil experiment? protons helium…

what does the term \alpha particles\ refer to in the context of the gold foil experiment? protons helium nuclei neutrons electrons
Answer
Brief Explanations:
In the gold - foil experiment, alpha particles are helium nuclei. They are positively charged and have relatively high mass.
Answer:
B. Helium nuclei