2
The surface of a single grain of NaCl
4
Each sand grain is composed of tiny atoms
8
Mercury and iodine combine to form mercuric iodide
9
A simple distillation apparatus
10
A line of the mixture to be separated is placed at one end of a sheet
11
The paper acts as a wick to draw up the liquid
12
The component with the weakest attraction for the paper travels faster and farther.