Reaction in which aqueous species are broken into their constituent cations and anions. Solids, liquids, and gases will NOT be broken apart and remain as molecules. Reaction in which only the species actively involved in the reaction are listed. Spectator ions, ions which appear on both the reactant and product side of a balanced equation, are cancelled and do not appear in the final net ionic equation. Be able to write a balanced molecular equation and then rewrite it as a balanced complete ionic equation, and a balanced net ionic equation.
Particles have definite mass and occupy space.
Waves have no mass, yet carry energy through space. Planck hypothesized that Energy must be emitted or absorbed in discrete packets or quanta. Einstein concluded that light consists of packets of light, photons, which are also quantized. The probability of finding an electron at some point is proportional to y 2 . The 4 quantum numbers define an electron.