Molecule
Two or more atoms bonded together
Chemical bond
Connection between atoms
Model
Representation of an object
Chemical formula
The atom(letters and numbers) that make up a molecule
Chemical structure
The specific way that atoms are arranged
Crystal
Structure of atoms or molecules in a 3D pattern
Polymer
Structure of molecules in a repeating chain pattern
Extended structure
A molecule whose atoms occur in a constant ratio + repeating pattern
Ratio
A quantity relationship between two things