On the periodic table, calcium and bromine are located in period 4. What is one difference between the two elements?

A. Calcium atoms are more reactive than bromine atoms.

B. Bromine and calcium atoms will each combine with the same elements to form compounds.

C. Calcium atoms combine more easily with other atoms in Group 2.

D. Bromine atoms have more electrons in their outer shell than calcium atoms.

Explanation:

it's is d cause bromine can even react with water so

lol idk man i guess u gotta ask bill nye the science guy

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.