1. which of the following elements has a complete outer shell of electrons? a. nitrogen (n) b. hydrogen (h) c. neon (ne) d. iron (fe) 2. when atoms of two or more different elements bond, their properties a. combine b. none of these c. change d. are the same as the largest atom in the compound

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.

it's c (engineer's do their work with mechanical stuff not on any living being)