Natural radioactivity consists of the emission of
A
α- particles and β-rays
B
α- particles and X-rays
C
α- particles, β - rays and y-rays
D
γ- rays and X-rays
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Radioactivity is the spontaneous emission of radiation from atomic nuclei. This radiation can consist of alpha, beta, and gamma radiation.
Source: Myschool Past Questions Archive (Record #47378)