How many grams of calcium nitride (Ca3N2) are produced when 4.00 g of nitrogen reacts with excess calcium?

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 will most likely happen when two bromine atoms bond together?

How is the shape of the poem “peer” connected to its meaning?