Question

The number of elements from the following that belong to group $13$ is -------.
$Al,Si,C,As,Ga,Ge,Tl,Pb,Sb,B$

Answer 1

Answer: 4

The boron group are the chemical elements in group $13$ of the periodic table, comprising boron $(B)$, aluminium $(Al)$, gallium $(Ga)$, indium $(In)$, thallium $(Tl)$, and perhaps also the chemically uncharacterized nihonium $(Nh)$. The elements in the boron group are characterized by having three valence electrons.