Question

What is the electronic configuration of elements IIIrd of group 13:

• A. $\text{1}{\text{s}}^{\text{2}}\text{,2}{\text{s}}^{\text{2}}\text{2}{\text{p}}^{\text{3}}$
• B. $\text{1}{\text{s}}^{\text{2}}\text{,2}{\text{s}}^{\text{2}}\text{2}{\text{p}}^{\text{6}}\text{,3}{\text{s}}^{\text{2}}\text{3}{\text{p}}^{\text{1}}$
• C. $\text{1}{\text{s}}^{\text{2}}\text{,2}{\text{s}}^{\text{2}}\text{2}{\text{s}}^{\text{6}}$
• D. $\text{1}{\text{s}}^{\text{2}}\text{,2}{\text{s}}^{\text{2}}\text{2}{\text{s}}^{\text{6}}\text{,3}{\text{s}}^{\text{1}}$

Answer 1

The correct option is B $\text{1}{\text{s}}^{\text{2}}\text{,2}{\text{s}}^{\text{2}}\text{2}{\text{p}}^{\text{6}}\text{,3}{\text{s}}^{\text{2}}\text{3}{\text{p}}^{\text{1}}$

• Group 13 elements: boron (B), aluminum (Al), gallium (Ga), indium (In), thallium (Tl).
• The third element of group 13 is $aluminum\left(Al\right)$
• For Aluminium (At. no. = 13)

Hence, option B is correct.