Is it possible to find density and volume of a substance with just the mass?

Even though an atom may be smaller than another atom, it might have more mass. The mass of atoms, their size, and how they are arranged determine the density of a substance. Density equals the mass of the object divided by its volume; D = m/v. Objects with the same mass but different volume have different densities.

these nuts

since electrons are negative the answer is neagtaive