Elliot took a piece of solid ice and left it in the sun. it melted and turned to liquid water. the water then evaporated into a gas. the molecules in the move faster than the molecules in the

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?