given oil density 900kg/m^3 fe=fg distance between capacitor plates d= 3.0 mm triangleV between plates= 11.7 v  dropplet radious is 250nm in m is 2.5e-7 find charge on droplet q, number of electrons q/e, rounded # of electrons n & percent error  charge q=mg/E , e=-1.60*10^-19c, %error-=|q/e-n|/n *100

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Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.