Le châtelier’s principle states that increasing temperature favors a reaction that a. releases energy as heat. c. involves a chemical catalyst. b. requires energy as heat. d. involves an enzyme.

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals