Understanding the atomic emission spectra.
The structure of the atom.
Using atomic mass to understand isotopes.
Understanding the electronic structure of an atom.
The meaning and uses of atomic numbers.
The periodic trend of atomic radii.
How to depict the electronic configuration of atoms using orbital diagrams.
How to predict the hybridization of atomic orbitals.
How an atom's outermost electrons contribute to bonding.
How to identify a specific electron in an atom's electron cloud using quantum numbers.
How to express the electronic structure of atoms using electron configuration notation.