A) fast moving electrons
B) hydrogen nuclei
C) helium nuclei
D) fast moving neutrons
Correct Answer: A
Solution :
Beta particles are high-energy. High-speed electrons or positrons emitted by certain types of radioactive nuclei such as potassium-40. The beta particles emitted are a form of ionizing radiation also known as beta rays. of the three common types of radiation, alpha, beta and gam- ma. beta has the medium penetrating power and the medium ionising power.
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