Drive a variable. Watch the chemistry respond.
Each sim goes with one lesson and uses that lesson's own numbers. Most have a Core and an AP level, investigation cards and a data table. Open one and start; nothing to install or sign in to.
Unit 1 · Atomic Structure and Properties
Moles, mass spectra and compositionMass Spectrometer Explorer
Fire atoms of 18 elements through a mass spectrometer and watch the spectrum build toward natural abundance, then read and draw spectra yourself.
Open sim Topic 1.3Hydrate Heating Lab
Heat six hydrates to constant mass and find the water of hydration from your own balance readings.
Open sim Topic 1.4Mixture Analysis Error Lab
Analyze three real mixtures by following one element, then switch on ten lab errors and see which way each one pushes the result.
Open simUnit 2 · Compound Structure and Properties
Chemical bondingBond Energy Explorer
Bring two atoms together and watch the potential-energy curve draw itself, then read bond length and bond energy from the well.
Open sim Topic 2.2Coulomb Ion-Pair Explorer
Pair any of 12 cations with 6 anions, drawn to scale, and compare their Coulombic attraction and energy wells.
Open sim Topic 2.3Ionic Lattice Explorer
Build a slice of an ionic solid ion by ion, every ion to scale, and check charges, sizes, neighbors and ratio.
Open sim Topic 2.4Metal & Alloy Explorer
Push the layers of a metal through its sea of electrons and build interstitial and substitutional alloys, atoms to scale.
Open sim Topics 2.5–2.6Lewis Builder
Build Lewis structures step by step for more than 120 molecules and ions, then work out formal charge and resonance.
Open simUnit 2 · Particles and Motion
Gases and the kinetic molecular theoryPVTn Particle Lab
Change the pressure, volume, temperature and amount of a gas and watch the particles explain each gas law, including partial pressures.
Open sim Molecular speedMolecular Speed Lab
Compare speed distributions for different gases and temperatures, race gases through a pinhole and identify a mystery gas by effusion.
Open simUsing these with a class? Link students straight to a sim's page: the addresses are permanent. Spotted something wrong, or want a sim for a topic that doesn't have one? Email hello@elementalsuccess.app.