posted on May, 15 2006 @ 08:45 PM
Changes in the elements is a nuclear reaction, not a chemical one. Radioactive elements decay into lighter elements, and under intense pressure and
heat (like in the core of the sun or the shockwave of a supernova), lighter elements can fuse into heavier elements. Also, bombardment by radiation
can create heavier elements (usually in the lab or a nuclear reactor).
[edit on 5/15/2006 by djohnsto77]