What does polarity look like in the macroscale

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

What is the molecular weight of copper

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