What differs between a radioactive isotope and a stable isotope?

a. stable isotopes are shorter
b. radioactive isotopes last for less time
c. radioactive isotopes last longer.
d. there is no difference

 A radioactive isotope is emitting particles such as a fast moving electron or positron (radiation) and this is changing its structure. Eventually it may reach a stable configuration and will no longer decay. An stable isotope is simply a name for a form of an element which is chemically identical to other atoms of the element but with a different number of neutrons. I hope this helps!

Only one reactant yields 2 or more products. meaning you will only have 1 product and it will break down into 2 or more products. eg. h2o -> h2 + o2

Idk the answer imthink snail cant mate they dont lol