As they are secret, I should not speak about them... However, I have a problem there.
Before it seems there was a menu alt ctrl to get them.
Now, you use the console. Ok... I succeeded to get and retrieve through research 8 secret elements. But how can I get the extended list of these elements apart from typing random combination of 3 then 4 letters on my keyboard :-))

Is there a secret secret code to get the list of secret elements ???

EDIT: Also the properties ! Iron is pretty obvious but the other...

Suggestion now: make an excel spreadsheet with the list of all elements and their properties. This is an easier way to work. In fact, I started to work on it...