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Natural radioactive decay?
I'm taking a distance learning class and was given a natural radioactive decay worksheet. I've got an e-mail in to my Professor to ask him about it. While I'm waiting I'll ask you guys.
Examples- fill in the blank
As-_+ a
Nd-_ + a
What's he looking for?
http://en.wikipedia.org/wiki/Alpha_decay
As corresponds to Arsenic, which has several radioactive isotopes. Nd corresponds to Neodymium which has three radioactive isotopes (and 6 stable ones)
http://www.chemicalelements.com/
http://www.dayah.com/periodic/
One possibility is that he is looking for the right hand side of an equation:
element X-nnn => As-xxx + a
where you have to determine the element X, its weight nnn, and the weight of the Arsenic or Neodymium isotope that results.
Another possibility is that he is looking for which isotopes of As and Nd decay with an alpha particle.
An Introduction to the Principles of Hikmah - Hakim Archuletta (Natural Health Series: Session 1)