Answer:
8 electrons
Each principal energy level can contain up to 2n2 electrons, where n is the number of the level. Thus, the first level can contain up to 2 electrons, 2(12) = 2; the second up to 8 electrons, 2(22) = 8; the third up to 18, 2(32) = 18; and so on.
Explanation:
<span>Chemical change is any change that results in the formation of new chemical substances. </span>
Mg+HCl -> MgCl2+H2
So, Hydrogen gas.
