I was going to mention (and now I wish I had, because it would make me look even smarter) that while arsenic has similar chemical properties as phosphorous the bonds that it forms are weaker. Being that it's valence shell is farther out, but that goes without saying. smile

Pioneer PDP-5020FD, Marantz SR6011
Axiom M5HP, VP160HP, QS8
Sony PS4, surround backs
-Chris