Question

Are no transition elements between the group 2 element magnesium and the group 13 element aluminium. Explain why in terms of electronic structure.

Answer 1

Elements of group 3 and group 13 are generally referred to as S block elements to mean that theirs outermost electrons are found in the S orbital  

hence referred to as S block elements. in the case of transition elements, theirs outermost electrons are found in the d orbital hence referred to as d block elements. This hence implies that no transition element can be found between group 2 element magnesium and group 13 element aluminium.

Answer 2

Magnesium has atomic number 12, its electronic configuration is

$Mg=1s^{2},2s^{2},2p^{6},3s^{2}\\ </p><p>and that of Aluminum(Atomic number 13) is</p><p>\\Al=1s^{2},2s^{2},2p^{6},3s^{2}\\3p^{1}$

For an element to be transition d or f subshell must have the valence electron, as there is no such element here so it can be said that there is no transition element between these two elements.