# Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95f: 102

D.

#### Work Step by Step

a) The foil's thickness is too large relative to the radius of a silver atom to make it impossible. b) There can't be a fractional number of atoms, but this number is in scientific notation, so it's most likely a very large integer, so it's possible. c) The mass of the coin is too large relative to the mass of a single gold atom to make it impossible. d) Since this number is less than the inverse of the Avogadro's number ($1.66\times10^{-24}$), it means that there would be a fractional number of atoms, which is impossible.

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