Simplify the following text for a Grade 17 native English-speaking person.
Original: This transformation may occur in various ways , including radioactive decay , either by emission of particles ( usually electrons ( beta decay ) , positrons or alpha particles ) or by spontaneous nuclear fission , and electron capture .
Simplified: This transformation may be accomplished in a number of different ways , including radioactive decay , either by emission of particles ( usually electrons ( beta decay ) , positrons or alpha particles ) or by spontaneous fission , and electron capture .