The group of experiment subjects that has the one condition change is the

control group

experimental group

hypothetical group

testable group

most likely he is cheating on you

the answer for sodium is 0.186

the answer for rubidium is 0.251

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.