How much an element depends on its configuration. a) gases are the reactive elements because their outer energy levels are with electrons. (except He, which is full with 2)b) In most chemical reactions, atoms try to the electron configurations of the noble gases by either or electrons.

po-215 i got it right on the quiz

< > according to newton's third law of motion, forces always act in equal but opposite pairs. another way of saying this is for every action, there is an equal but opposite reaction.< >

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.