Pre-lab questions 1. a concentration gradient affects the direction that solutes diffuse. describe how molecules move with respect to the concentration.

Just like how heat moves from a region of higher temperature to a region of lower temperature, molecules also tend to move from a region of higher concentration to a region of lower concentration. This is called natural diffusion and is naturally happening to reach stability.

indium, and thallium have three electrons i think

it's c. elements are placed in rows based on how may valencies electrons have.