Each element in Period 3 has its valence electrons in the same electron shell, however, moving from left to right across period 3, each element has one more electron and one more proton than the element before it. As a result, explain what happens to the atomic radius as we go from left to right across period 3.

the awnser is group 12

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.