50 Points Which of the following sequences of elements would all have four valence electrons?
B, Si, As, Te

C, Si, Ge, Sn

O, S, Se, Te

Ga, Ge, As, Se

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.