Which statement is true about sodium and chlorine?
a. they usually occur as gases at room temperature
b. they have the same kind of subatomic particles
c. they are both solids in their natural state
d. they are close together in the periodic table

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.