Chuck wants to know how many electrons in an atom are not paired up. Which model would be best for Chuck to write out?

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

answer; talc and gypsum;

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a