One half of Barium-139 decays into another element after 86 minutes. The 86 minutes is referred to as this element's... Select one:
a. half-life.
b. radioactive phase.
c. time zone.
d. quarter time

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.

What is the equilibrium constant of aa+bb=cc+dd

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?