What is the equation of sodium phosphide

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

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?

Which fact represents evidence for the big bang theory?