This riddle is wrong. The text says: Name the only atom whose atomic number is 5 time is valence electrons.

Well, there are TWO atoms with that condition. The text in the riddle should be changed.



EDIT: The riddle is number 56 not 52. Sorry :P

No, there is only one atom. You may PM me and tell me which one is the other one.

Only one that I am aware of. If you find more than one, you probably have the science part wrong.

I just sent you a PM.

EDIT: The PM was sent to Riddler of Riddles.