I am certainly not expert, but if by 'Art' you mean creating 'paintings' (bit maps) or 'drawings' (vector graphics) I would have thought any graphics capability would be sufficient.
But if you mean creating HD animated cartoons or videos, then that would probably require a more powerful graphics card.
I didn't know Chromebook, but just had a look. Seems to be another step in Google's campaign to take over the world! Stores data and other 'stuff' in the 'cloud', ie on distant servers, not on your own hard disc, which is a 16 gig 'solid state' drive, which means it's a chip, not a rotating disc at all; cloud storage is 100 gig, (over 2 years I think, but not certain about that.) Comes with all the Google programs, but I don't know what it has in way of Word, Paint, Draw, etc, but it's used in schools so must have them, but may cost extra for them.
Different versions by different makers, HP has 14" screen, others smaller (11" ?) but I haven't checked other specs.
You need to do plenty of research to sort out what it all means, and what to go for. Larger screen quite important I think.