What is the most stable monatomic ion formed from aluminum?

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?

Is laundry detergent an acid or a base?

What is the work done by the electric force to move a 1 c charge from a to b?