If by classical you mean formula name it is CrPO4<span>.</span>
F I think since the one on the worst line is an E so I’m pretty sure it’s F :p
The answer for that kind of question depends on many things. location, how many people will inhabit the home, whether or not the home is a vacation home or a full time home. etc. P.S. I do not believe that this has anything to do with chemistry
