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

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

NTA AbhyasNTA Abhyas 2022

Solution:

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.