Elements D and E are in Period 2. Element D has n protons and its valence
configuration is fully filled. Elements E has
(n+1) protons. Choose the incorrect
statement about D and E.
A. E is more electronegative than D.
B. E atom is smaller than D atom.
C. The electron affinity of Dis exothermic
D. Dis a metal whereas Eis metalloid.

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.

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

Which of the following changes will decrease the total amount of gaseous solute able to be dissolved in a liter of liquid water? (2 points) decreasing temperature decreasing pressure decreasing surface area decreasing solute concentration