1. The problem statement, all variables and given/known data An element of atomic number 82 and mass number 214 decays radioactively to an element of atomic number 82 and mass number 210. Which of the following emissions achieve this result? Check all that apply. a. four beta particles b. two beta particles and one alpha particle c. two alpha particles d. one alpha particle 3. The attempt at a solution I know that an atom cannot emit both alpha particles and beta particles. so the options are down to a, c, and d. but if the atom emits beta particle, the atomic mass number doesn't change, but if the atom emits alpha particle, the atomic number should change. but in this problem, only the atomic mass number change, but the atomic number does not change. so I'm really confused. please help me.. thanks in advance..