Build Molecules - Molecule Lab

Molecule Builder - Interactive Chemistry Learning App

Discover the world of chemistry through hands-on molecular construction. Molecule Builder is designed for students, teachers, and chemistry enthusiasts of all levels.

CORE FEATURES

Drag-and-Drop Building
Build molecules by dragging atoms from your atom palette into the workspace. It works smoothly with touch and mouse controls.

Smart Chemical Bonding
Atoms form bonds automatically when they are close enough. The bonding logic follows valence rules and supports single, double, and triple bonds.

118 Atoms in 10 Categories
Explore 118 atoms organized by category:

Non-metals
Halogens
Noble gases
Alkali metals
Alkaline earth metals
Transition metals
Metalloids
Other metals
Lanthanides
Actinides
Each atom includes its symbol, name, and valence value for learning and reference.

140+ Molecule Recognition
Build compounds and identify them instantly from a database of 140+ known molecules.
Recognized molecules include:

Basic molecules (H2O, O2, N2)
Hydrocarbons (CH4, C2H6, C3H8, C6H6)
Alcohols (methanol, ethanol, propanol, glycerol)
Acids (sulfuric, nitric, acetic, citric)
Salts and minerals (NaCl, CaCl2, MgSO4, and more)
Organic compounds (glucose, sucrose, amino acids)
Each result shows molecule name, formatted formula, and a direct PubChem link.

Molecule Library
Browse a built-in molecule library and load predefined molecules directly into the workspace to study or modify them.

Lewis Structure Viewer
Visualize the Lewis structure of 37 molecules directly from the library. See atoms, bonds, and non-bonding electron pairs drawn on screen — single, double, and triple bonds included. Lewis structures. Crystal clear science.

Custom Atom Palette
Personalize your atom palette with up to 10 atoms for faster building. Your palette is saved locally between sessions.

Visual Bond Rendering
Bonds are drawn in real time on canvas, including visual support for double and triple bonds.

Workspace Tools

Move atoms freely to rearrange structures
Delete atoms by dragging them to the trash zone
Clear all atoms with one tap
Responsive layout for mobile and larger screens
Educational Support
Learn with real-time molecular formula generation using the Hill system, plus quick access to common compounds.

Start building molecules today and turn chemical formulas into interactive structures.