Question: the mass of an eletron is 9.109 * 10^-31 kilograns. the mass of a proton is 1.673 * 10^-27 kilograms. how many times heavier is a proton than 4 electons?
The mass of 4 electrons is: 4*9.109 * 10^-31 kg = 3.6436 * 10^-30 kg.
The mass of one proton is 1.673 * 10^-27 kg.
The ratio of their weights is: R = (1.673 * 10^-27) : (3.6436 * 10^-30)
R = (1.673 * 10^3) : (3.6436)
R = 1673 / 3.6436
R = 459.16