As we’ll discuss in Chapter 30, radioactive decay involves the nucleus of an atom decaying by emitting either a particle or energy or both. The ²¹⁶Po nucleus decays to ²¹²Pb by emitting an alpha particle, which is a helium nucleus, 4He. Using the mass data given in Appendix A, find 

(a) The mass change in this decay and 

(b) The energy that this mass represents. 

(c) Given that no other particles or energy are emitted in this process, where must the energy go?