What determines the type of radioactive decay that occurs in a radioactive isotope?

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Is of of 3- ? a. 1--3- b. 1--2- c. 1--3- d. of

How many moles of na2s2o3 are needed to react with 0.12mol of cl2? show work.