When We Say That Radioactivity Is Nature's "Philosopher's Stone," We

Multiple Choice

When we say that radioactivity is nature's "philosopher's stone," we mean that

A) radioactivity was discovered by Plato.
B) the number of neutrons in a radioactive nucleus can change.
C) radioactivity can change one element into another by changing the number of protons in a nucleus.
D) electron spin varies in a radioactive atom.
E) any atom that undergoes radioactive decay eventually becomes an atom of lead.