That is because Alchemy is not based on real research and facts, but rather on magic and occultism. Sure, many things in it have been used as basics for some chemistry, but most is false and incorrect.
To be honest, I can’t really see the question. So please next time just type it out lol
Because it represents 2 atoms of carbon not 2 molecules of carbon
Low melting points and boiling points. ...Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.Soft or brittle solid forms. ...Poor electrical and thermal conductivity.
A metal rail rusting in damp weather.