Videos:
Pure substances and mixtures
Homogeneous and heterogeneous mixtures
Properties of elements: Physical | Chemical
Gallium spoon
Colloids
Aerogel
Surface tension demo (start from 6:26)
Separating techniques: 1 | 2 | 3 | 4 | 5
Shedding Light on Atoms (series)
Nanomaterials: Measuring | Properties | Nanotechnology
Your Body's Molecular Machines
Experiments:
Properties of Substances
Animations and simulations:
Build an Atom
Models of the Hydrogen Atom
Animated notes:
Electronic configuration
Videos:
Electron Arrangement (chapters 1-6 only)
Practice:
Electronic configuration practice
Additional information:
Visible Spectra of the Elements
Atomic spectra and electron subshells
Fluoro tube spectrum photo
Tools:
ChemReference (Chrome extension)
Notes:
Moles and Mass
Assignments:
Moles and Mass Questions | Answers
Animations and simulations:
Isotopes and atomic mass
Videos
Significant figures
Units
Mass spectrometry
The mole concept
The amazing mole
The mole: a chemical measure
Practice:
Problem solving questions (and list of Isotopic abundances)
Relative atomic mass practice
Calculations practice program (choose Mass-mole)
Videos:
The Periodic Table
Atomic Size and Metallic Character
Valence Electrons and Valency
More advanced videos:
The Periodic Table: Atomic Radius, Ionization Energy, and Electronegativity
Quantum Numbers, Atomic Orbitals, and Electron Configurations
Orbitals: Crash Course Chemistry #25
Games and activities:
Periodic table table
Bond Breaker
