Which orbital is the first to fill with electrons in a given principal energy level? A. both d and f
B. s
C. f
D. р
E. both s and p

Newtons second law deals most cosely with

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.

Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment?