What conclusion is best supported by the decay chain?
each alpha decay results in an isotope that is slightly more stable than the original isotope.
each beta decay results in an isotope that is slightly more stable than the original isotope.
the atomic number increase caused by two beta decays is the same as the decrease caused by one alpha decay.
the mass number increase caused by two beta decays is the same as the decrease caused by one alpha decay.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?