A mystery atom has 17 protons, 17 electrons, and 18 neutrons. Which element is it?

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.

Nan element’s square on the periodic table, the number with the greatest numerical value represents the

Calculate the ph of a .10m nh4cl solution. the kb value for nh3 is 1.8×10^-5