Question

state the valencies of magnesium and aluminium​

Answer 1

Answer:

The electronic configuration of Magnesium is -

2, 8, 2

Hence it's valency is 2

The electronic configuration of Aluminium is -

2, 8, 3

Hence it's valency is 3

Answer 2

$\huge\ \pmb{\red{«\: คꈤ \mathfrak Sฬєя \: » }} \\ \cal{ Magnesium=Mg^{2+} = 2 + } \\ \cal{Aluminium = Al {}^{3 + } = 3 + }$

Valency: It is the ability of an atom to gain or lose electron in order to achieve the noble gas configuration. It refers to the ability of an element to combine with other element.

$\: \: \: \: \: \: \: \: \: \: \huge \bold{@WildCat7083 }$