It is the brass because it is in the brass family with the instrument ls included during the explanation
Eu acho que a matéria de artes do Brasil é mais fácil
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.
