The type of radioactive particle that can be stopped by a sheet of paper is the….(Multiple choice.)?
a. gamma ray
b. nuclide
c. alpha particle
Negatively charged particles emitted from a nucleus at high speed are:
a. alpha particles
b. x-rays
c. gamma rays
d. beta particles
Each element with an atomic number greater than 83 is
a. radioactive
b. stable
c. material
A. B. A. ?
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