You work as a volunteer at the local science museum. You are asked to design an exhibit that
compares the size of a lithium atom to the size of
its nucleus. A lithium atom has a diameter of about
3 X 102 picometers. The nucleus of a lithium atom
has a diameter of about 5 X 10-3 picometers.
There are a trillion (10^12) picometers in a meter.

State the problem in your own words. What decisions will you need to make before you can proceed?