Chemistry

Investigate atoms, molecules, reactions, states of matter, and the building blocks of all substances.

27 simulations
Chemistry
Acid-Base Solutions
Chemistry

Acid-Base Solutions

How do strong and weak acids differ? Use litmus paper, pH meter, and conductivity tester to compare strong and weak acids and bases. Observe the molecules in solution.

AcidsBasesHigh School
Chemistry

Alpha Decay

Watch alpha particles escape from a polonium nucleus, causing radioactive alpha decay. See how random decay is, and observe the half-life of polonium-211.

Alpha DecayRadioactivityHigh School
Atomic Interactions
Chemistry

Atomic Interactions

Explore the interactions between various combinations of two atoms. Observe the potential energy diagram and see how it relates to the force between atoms.

Intermolecular ForcesVan der Waals ForcesHigh School
Balancing Chemical Equations
Chemistry

Balancing Chemical Equations

How do you know if a chemical equation is balanced? Play a game to balance chemical equations. Adjust coefficients to ensure the same number of atoms on both sides.

Chemical EquationsConservation of MassMiddle School
Beer's Law Lab
Chemistry

Beer's Law Lab

Make colorful concentrated and dilute solutions and explore how light interacts with the solution. Connect the wavelength and concentration of the solution to its absorbance and transmittance.

Beer-Lambert LawSpectrophotometryHigh School
Beer's Law Lab
Chemistry

Beer's Law Lab

Investigate how the concentration of a solution affects the amount of light that passes through it. Measure the absorbance of solutions at different concentrations and wavelengths.

Beer-Lambert LawSpectrophotometryHigh School
Chemistry

Beta Decay

Build an atom in the nucleus, then fire it off and see what happens! Watch beta decay happen in real time. Observe how the nucleus changes when a neutron becomes a proton.

Beta DecayRadioactivityHigh School
Build a Molecule
Chemistry

Build a Molecule

Starting from atoms, see how many molecules you can build. Collect your molecules and see them in 3D! How many can you collect?

Molecular StructureChemical FormulasMiddle School
Build an Atom
Chemistry
★ Featured

Build an Atom

Build an atom out of protons, neutrons, and electrons, and see how the element, charge, and mass change. Then play a game to test your ideas!

Atomic StructureProtonsMiddle School
Concentration
Chemistry

Concentration

Watch your solution change color as you mix chemicals with water. See how concentration changes with the amount of solute and solution volume. Calculate and display concentration in Molarity.

ConcentrationMolarityHigh School
Greenhouse Effect
Chemistry

Greenhouse Effect

How do greenhouse gases affect the climate? Explore the effect of greenhouse gases on the temperature of the earth. Adjust the concentration of greenhouse gases and observe the effect on temperature.

Greenhouse EffectClimate ChangeMiddle School
Isotopes and Atomic Mass
Chemistry

Isotopes and Atomic Mass

Are all atoms of an element the same? How do atoms of the same element differ? Explore the concept of isotopes by building atoms with different numbers of neutrons.

IsotopesAtomic MassHigh School
Molarity
Chemistry

Molarity

What determines the concentration of a solution? Learn about concentration, molarity, and the factors that affect it. Observe how adding solute and changing volume affects molarity.

MolaritySolutionsHigh School
Molecule Polarity
Chemistry

Molecule Polarity

When is a molecule polar? Explore electronegativity and molecular polarity. Adjust the electronegativity of atoms in a molecule and see how it affects the bond dipoles and molecular dipole.

Molecular PolarityElectronegativityHigh School
Molecule Shapes
Chemistry

Molecule Shapes

Explore molecule shapes by building molecules in 3D! How does molecule shape change with different numbers of bonds and lone pairs? Find out by adding single, double or triple bonds and lone pairs to the central atom.

VSEPR TheoryMolecular GeometryHigh School
Molecule Shapes: Basics
Chemistry

Molecule Shapes: Basics

Explore molecule shapes in 3D. Build simple molecules and observe how the number of bonds and lone pairs determines the shape.

Molecular GeometryVSEPRHigh School
Molecules and Light
Chemistry
★ Featured

Molecules and Light

Do you ever wonder how a greenhouse gas traps heat from the sun? Explore how light interacts with molecules in our atmosphere. Start with the basics and then see how light interacts with ozone, oxygen, and other atmospheric molecules.

Greenhouse EffectMolecular VibrationHigh School
Chemistry

Nuclear Fission

Start a chain reaction, or introduce non-radioactive isotopes to prevent one. Control energy production in a nuclear reactor!

Nuclear FissionChain ReactionHigh School
pH Scale
Chemistry
★ Featured

pH Scale

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution.

pHAcidsHigh School
Chemistry

Quantum Bound States

Explore the quantum mechanical model of bound states. Observe wave functions, energy levels, and probability densities for particles in various potential wells.

Quantum MechanicsWave FunctionsUniversity
Chemistry

Radioactive Dating Game

Learn about different types of radiometric dating, such as carbon dating. Understand how decay and half life work to enable radiometric dating. Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.

Radioactive DecayHalf-LifeHigh School
Reactants, Products and Leftovers
Chemistry

Reactants, Products and Leftovers

Create your own sandwich and then see how many sandwiches you can make with the ingredients you have. Apply the same concept to chemical reactions.

StoichiometryChemical ReactionsHigh School
Chemistry

Reactions and Rates

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments that show how factors like concentration, temperature, and surface area affect reaction rates.

Chemical KineticsReaction RatesHigh School
States of Matter
Chemistry
★ Featured

States of Matter

Watch different types of molecules form a solid, liquid, or gas. Add or remove heat and watch the phase change. Change the temperature or volume of a container and see a pressure-temperature diagram respond in real time.

States of MatterPhase ChangesHigh School
States of Matter: Basics
Chemistry

States of Matter: Basics

Heat, cool, and compress atoms and molecules and watch as they change between solid, liquid, and gas phases.

States of MatterSolidElementary School
Chemistry

Sugar and Salt Solutions

Add different salts or alcohols to water, then watch them dissolve and see a diagram of the resulting solution. Determine if a substance is a strong or weak electrolyte by measuring the conductivity.

SolutionsElectrolytesHigh School
Chemistry

Wave Packets

Explore the wave-particle duality of quantum mechanics. Build wave packets from superpositions of plane waves and observe the uncertainty principle in action.

Quantum MechanicsWave-Particle DualityUniversity