Would you define boiling point and melting point as a periodic table family trend (vertical groups), period trend (horizontal rows), or neither? explain your answer.

i am so stumped on this question me out. it does not that my school did not give me a science book

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next