Talk:Science and Technology/@comment-25205238-20180908171849/@comment-32873293-20181028092840

An element can be dormant in its nature state and became higly radioactive when it is processed. For example the hydrogen. It is harmless naturally. But when bombard it with neutrons, it became radioactive and ultimately a hydrogen bomb. So it can be a chemical reaction caused by hytholodium that made prisoners sick