Suppose you are asked to identify an unknown element based on its spectrum, and you see that it has a bright yellow line at 587 nanometers, a bright green line at 557 nanometers, and multiple blue or violet lines between 425-450 nanometers. Based on your observations and the spectra you have seen throughout this activity, what is the unknown element most likely to be

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all 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.

Using the periodic table, complete the table to describe each atom. type in your answers