Question

Reacts element A which has 7 electrons on layer 3 with 2 moles of magnesium. Indicate element A, model the magnesium bond and specify the number of protons found in the required amount of element A.

Answer 1

Element A is a Chlorine, he has 7 electrons on 3 layer, and 17 protons. Chlorine is a chemical element with the symbol Cl and atomic number 17.

Mg + Cl2 = MgCl2

Cl-Mg-Cl

Mg - 2e = Mg^2+

Cl + 1e = Cl^-