A. Baroque paintings are ornate and fancy.
Because they show each note and how to play
Tetravalent
We have already seen an example of how a covalent bond can form between two hydrogen atoms producing molecular (H2) as opposed to the atomic form of hydrogen. ... As in all its compounds and its elemental forms, carbon is tetravalent, which means that it always forms four bonds.
this is something you should look up instead of posting on a learning platform