Why does the effective nuclear charge increase across a row of the periodic table?

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?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false