The following equations represent part of a radioactive decay series: 1. 92238u → a + 24he 2. a → 91234pa + b 3. 91234pa → c + –10e 4. c → 90230th + 24he 5. 90230th → d + 24he 6. d → 86222rn + e 7. 86222rn → 84218po + f 8. 84218po → g + 24he 9. g → 83214bi + h 10. 83214bi → i + –10e 11. i → j + 24he

Explanation:

An atom consists of two regions. The first is the tiny atomic nucleus, which is in the center of the atom and contains positively charged particles called protons and neutral, uncharged, particles called neutrons. ... Most atoms contain all three of these types of subatomic particles—protons, electrons, and neutrons.