the question in my paper was ; what is the electronic configuration of alkali metals halogens and noble gases i wrote alkali metals; 1s2, 2s1 halogens; 1s2 ,2s2,2p3 nobel gases; 1s2 2s2 2p4 is this answer correct

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

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.