CC0 1.0 Universal
Set includes models for carbon, nitrogen, oxygen, and hydrogen. There are also double bond versions for carbon, nitrogen, and oxygen. There are models with letters (e.g. "H" for hydrogen) and models without to aid in teaching. "Bonds" are flat sides that attach to other atoms. Single, double, and triple bonds have their own unique flat area diameters that increase respectively.
STL files use the following naming convention:
XXXX: model type, such as "Hydrogen" or "CarbonDbl".
_YYYY: "_wText" added if the atom identifier is present
_ZZZZ: The number of atoms in the STL file (e.g._25 for a 5x5 grid of atoms), if there are more than one.