Here is a copy of a past national challenge exam that you can use in your general chemistry course as a unit or semester review. Sixty multiple-choice questions query learners on properties of matter, stoichiometry, reactions, and...

Determine the mass of two different isotopes of an element based on their deflection by a magnetic field.

You will be presented with three different isotopes of the same element. See if you can calculate the atom's average relative mass.