Which diagram shows the correct distribution of electrons in the electron shells of magnesium atom?

For Magnesium the distribution of electrons is the following; two electrons in shell one, eight in shell two, and two more in shell three.

Magnesium has an atomic number of 12. Now for the first 18 elements we know that the 3rd shell can hold 8 electrons, the 2nd 8 and the first 2.

On Edgenuity is the third option.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.