LAB 01Free labVBT overlapping
Choose two s, p or d orbitals and an internuclear axis, then test whether their symmetry and phase produce σ, π, δ, mixed or no overlap.
SIMULATION LIBRARY
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Explore 21 interactive simulations. Find a concept, change a variable and see the chemistry for yourself. Our current collection focuses mainly on bonding, periodic trends and physical chemistry; organic chemistry coverage is still growing.
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FEATURED LAB / 01FREE TO EXPLORE
VBT · Orbital overlappingRotate, compare and discover how bonds form.Open VBT lab ↗START HERE · FREE FOUNDATION LAB
New to chemical bonding?
Begin with Fajan’s Rule: compare ion size, charge and polarisation before exploring more advanced orbital models.
Open Fajan’s Rule free →Lab numbers are permanent identifiers, so retired slots are not reused. The Periodic Basic Quiz is a practice activity in My Learning, separate from this simulation catalog.
21 matching simulations
LAB 01Free lab
LAB 02Interactive labHybridization 3D Lab
Explore solid hybrid orbitals and complete VSEPR geometries from steric number 2 to 7, then practise 50 foundation, core and advanced questions.
LAB 03Interactive labInert Pair Effect 3D Lab
Visualise why the ns² electron pair participates less down Groups 13–15, compare lower and higher oxidation states, and solve guided practice questions.
LAB 04Free labFajan's rule- Polarization
Keep ion centres fixed while charge, radius, shielding and electronic configuration reshape the anion cloud, then compare compounds and test Fajan's rule.
LAB 05Free labSchrödinger 3D Orbital & Node Lab
Explore probability clouds, boundary shapes and radial/angular nodes across s, p, d and f orbitals in a rotatable 3D space.
LAB 07Interactive labHydration Energy & Ionic Mobility
Watch water dipoles approach, orient and lock around an ion in a rotatable 3D hydration shell, then compare realistic hydrated-ion motion in an electric field.
LAB 08Interactive labMolecular Existence Mega Lab
Explore 106 molecule and ion cases by periodic group, then compare their structures, stability, ligand effects and redox behaviour.
LAB 09Interactive labLewis Structure 3D Lab
Build Lewis dot structures step by step across molecules and ions while tracking valence electrons, formal charge, resonance, geometry and σ/π bonding.
LAB 10Interactive labBent's Rule
See how central-atom s and p character redistribute between bonds, then connect hybrid character with angles, placement and bond length.
LAB 11Interactive labResonance 3D Lab
Connect aligned p-orbital overlap with imaginary canonical contributors and the real resonance hybrid across 23 important conjugated systems.
LAB 12Interactive labZ-Effective 3D Lab
Visualise effective nuclear charge as nuclear attraction minus shielding, apply Slater's rules across Period 2 and Group 1, and compare s, p, d and f penetration.
LAB 13Interactive labBridge & Banana Bonding 3D Lab
Explore bridge and banana bonding from foundation to advanced level through rotatable 3D models of B₂H₆, Be₂H₄, Al₂Cl₆, Be₂Cl₄, polymeric BeCl₂, I₂Cl₆ and Al₂(CH₃)₆.
LAB 14Interactive labInorganic Compounds for Chemical Bonding 3D Lab
Explore 49 rotatable inorganic structures organised by central element, including oxides, oxyacids, rings, peroxo species, ionic units and network solids.
LAB 15Interactive labOleum Labelling 3D Lab
Build the mass balance of oleum in a rotatable 3D laboratory, vary the percentage label from 100 to 122.5, run virtual hydration and practise worked Mole Concept questions.
LAB 16Interactive labBack Bonding 3D Lab
Watch lone-pair donation into a neighbouring vacant orbital, compare 11 back-bonding systems, follow seven shape changes and solve 22 guided challenges.
LAB 17Interactive labChromatography 3D Lab
Run column, thin-layer and paper chromatography in 3D, compare stationary and mobile phases, and measure separation with an interactive Rf calculation.
LAB 18Interactive labGraham’s Law & Molecular Speeds 3D Lab
Compare effusion, diffusion and molecular-speed distributions in an interactive gas lab, then connect rate ratios with molar mass and temperature.
LAB 19Interactive labP–V–T State Space & Gas Laws 3D Lab
Explore pressure, volume, temperature and amount in a live piston model, trace gas-law curves, collect data and connect macroscopic changes with particle motion.
LAB 20Interactive labMaxwell–Boltzmann 3D Lab
Explore molecular motion and speed distributions in 3D. Change temperature and gas mass, compare fixed speed bands and practise 20 questions with worked solutions.
LAB 22Interactive labBarometer & Manometer 3D Lab
Measure pressure with four 3D apparatus setups. Compare liquid levels, density, gravity and gas compression, then practise 20 questions with worked solutions.
LAB 23Interactive labBomb Calorimeter 3D Lab
Explore combustion in a 3D calorimeter, compare sample and water masses, and solve 20 questions with worked solutions.
Reaction Mechanisms
Resonance is now live. Curved-arrow pathways, intermediates and selectivity labs are next.