Which is a substance made up of only one kind of atom?
A. compound
B. solution
C. element
D. mixture

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

How many electrons does silver have to give up in order to achieve a sido noble gas electron configuration

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