Study Guide

Common Mistakes

Common Mistakes

The Atom

SI units matter a lot for electron energy level conversion, but not for comparing energy levels to each other.

The units we use for time in the half-life equation don't matter, however, because the unit of time cancels out within the exponent.

Particle Physics

The conservation laws are here to help. If charge, energy-mass equivalence, lepton charge, momentum, etc. aren't conserved, then something's wrong.