- #1
sderamus
- 19
- 0
I always thought I'd do well on that game show: Are you smarter than a 5th Grader? Guess I'd lose - my educational level stops at the fourth.
IAE, my son is lead (i.e. Pb) for his 5th grade science project. He has to tell the class where he came from. I had always thought lead came from one of three decay series: Uranium, Thorium, and Actinium (I got that for him easy enough). But that only explains lead 206, 207, and 208. Apparently "natural" lead is isotope Pb-204, and that is the most abundant (I think). But how is that made? I checked my sources and apparently it comes about via the s-process vice the r-process, but no indication of how. I thought s-process nucleosynthesis was only inside stellar cores and stopped at Fe - 56 protons away! All else either comes from explosive nucleosynthesis (which I understand is the r process) or radioactive decay. So where does all the Pb-204 come from then? Am I missing a radioactive series? Or is there more to explosive nucleosynthesis?
I'm probably going way too far on this for a 5th grade class, but it now has my attention and I can't shake it! It's a helluva day when 5th graders are studying nucleosynthesis, but simply saying that the elements are cooked inside stars or exploding stars or come from radioactive decay is probably sufficient for them to understand.
TIA!
Sterling
IAE, my son is lead (i.e. Pb) for his 5th grade science project. He has to tell the class where he came from. I had always thought lead came from one of three decay series: Uranium, Thorium, and Actinium (I got that for him easy enough). But that only explains lead 206, 207, and 208. Apparently "natural" lead is isotope Pb-204, and that is the most abundant (I think). But how is that made? I checked my sources and apparently it comes about via the s-process vice the r-process, but no indication of how. I thought s-process nucleosynthesis was only inside stellar cores and stopped at Fe - 56 protons away! All else either comes from explosive nucleosynthesis (which I understand is the r process) or radioactive decay. So where does all the Pb-204 come from then? Am I missing a radioactive series? Or is there more to explosive nucleosynthesis?
I'm probably going way too far on this for a 5th grade class, but it now has my attention and I can't shake it! It's a helluva day when 5th graders are studying nucleosynthesis, but simply saying that the elements are cooked inside stars or exploding stars or come from radioactive decay is probably sufficient for them to understand.
TIA!
Sterling