Question

A gas is collected from a radioactive material; upon inspection, the gas is identified as helium. the presence of the helium indicates the radioactive sample is most likely decaying by

Answer 1

The presence of helium gas indicates the radioactive sample is most likely decaying by α-decay, or alpha decay. α-decay is the type of radioactive decay in which an atomic nucleus emits α particles. α particles are Helium nuclei. So the correct answer would be α-decay.