Your friend says that the helium used to inflate balloons is a product of radioactive decay. Another friend says "no way." With whom do you agree?
A. Helium is an element of the periodic table, not some product of any reaction. Agree with the friend who says "no way."
B. Your first friend is correct. Radioactive isotopes emit alpha particles which, in turn, capture electrons and become helium atoms.
C. If helium were a product of radioactive decay, we would all be radioactive. Agree with the friend who says "no way."
D. Radioactive decay produces alpha particles, not helium. Agree with the friend who says "no way."
Answer: B
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