Respuesta :

The element is Magnesium

  • It has total 12 electrons

it has electronic configuration

[tex]\\ \sf\longmapsto 2,8,2[/tex]

or

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^2[/tex]

In valence cell it has 2 electrons and therefore its valency is 2