21. His thesis was " The Radioactive Decay of Hafnium and Thulium Isotopes ". 22. Their radioactive decay is accompanied by the emission of single protons. 23. Elements such as lead formed largely through the radioactive decay of heavier elements. 24. :For practical purposes, decay rates for spontaneous radioactive decay are constant. 25. Another danger of actinium is that it undergoes radioactive decay faster than being excreted. 26. Heat generated by the natural radioactive decay of the plutonium is converted into electricity. 27. Most helium on Earth is a result of radioactive decay . 28. These superheavy elements may have a nucleus that is relatively stable against radioactive decay . 29. A typical simple example is the linear differential equation used to model radioactive decay . 30. Leptons also undergo radioactive decay , meaning that they are subject to the weak interaction.
