The period number is equal to the number of __ within an atom that contain ___

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Stage in which a typical star has completely stopped fusion

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?