Official
Bring it on
mm yeh, however, a senior marker (that teaches at my school) says the answers in success one are "band 5 at best", i.e. I need further confirmationpretty sure i've seen americium used as an answer in the successone book for a 5 marker on radioisotopes
i just stick to cobalt-60 (medicine) and ceasium-137 (industry)
I think I'll probably switch to Strontium-90 for Industry..