A force of attraction would exist between A.
a negatively charged object and a neutral object.
B.
two negatively charged objects.
C.
a positively charged object and a negatively charged object.
D.
two positively charged objects.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach