The periodic trend of atomic radii.
The structure of the atom.
Understanding the structure and history of the atomic nucleus
Using atomic mass to understand isotopes.
Understanding the electronic structure of an atom.
An explanation of the relative size of atoms.
The history of atomic models.
How kinetic and potential energy exist in atoms.
The meaning and uses of atomic numbers.
Understanding the atomic emission spectra.
How to calculate the surface area of a sphere given a radius.
How to define a tangent line; how to determine the angle a radius to a tangent forms.
How to depict the electronic configuration of atoms using orbital diagrams.
How to derive the formula to calculate the area of a circle.
How to calculate the volume of a sphere.
How to predict the hybridization of atomic orbitals.