To determine the direction in which negatively charged atoms (or more accurately, negatively charged particles like electrons) move in soda cans, we need to consider the context, such as the presence of an electric field or other influences.
If we assume there's a reason for the movement, such as a potential difference or influence from an external electric field, typically, negatively charged particles move towards regions of higher potential (positive charge).
Without specific context (e.g., the presence of an electric field or charge distribution), it's difficult to provide a definitive answer. However, if there is an established electric field, negatively charged atoms would move toward the positive side of that field.
If you need a straightforward selection from the options provided, typically, negatively charged particles could move from the right to the left or from the left to the right based on the specifics of the electric field applied.
Please provide more context to give a more accurate response.