Question

How many valence electrons does an atom of gallium possess?

• A. $1$
• B. $3$
• C. $5$
• D. $7$

Answer 1

The correct option is B $3$

$\left(B\right)$ $3$

Gallium(Ga) has three valence electrons. It is located in group $13$. As we know, electronic configuration of $Ga$ is :[Ar} $4s^2$ $3d^{10}$ $4p^1$. So, in a chemical reaction, one can lose the electrons in the $4s$ and $4p$ subshell, and the total number of electrons in these subshells is $three$.