an isotope undergoes radioactive decay by emitting radiation that has a -1 charge. what other characteristic…

an isotope undergoes radioactive decay by emitting radiation that has a -1 charge. what other characteristic does the radiation have? some shielding required no mass large mass high penetrating power
Answer
Brief Explanations:
When an isotope emits radiation with a - 1 charge, it is emitting beta - particles (electrons or positrons in some cases, here we assume electrons as the common case). Beta - particles have some shielding requirements. They are not massless (have a small mass compared to protons and neutrons), and their penetrating power is less than gamma - rays but more than alpha - particles. They don't have a large mass.
Answer:
some shielding required