Molecule Forge

You're given a set of atoms and a target molecule. Connect them with bonds so each atom's valence is satisfied and the structure matches the goal, single, double or triple bonds where they're needed.

• Click one atom, then another, to bond them together
• Click an existing pair to upgrade its bond order or remove it
• Satisfy every atom's valence to complete the molecule
• Match the target structure to clear the level

• Easy, Medium or Hard difficulty for bigger molecules
• Daily puzzle or Practice for fresh targets

• Desktop: click two atoms to bond; click a bonded pair to change or remove the bond
• Phone & tablet: tap two atoms to bond and tap a pair to adjust it

• Place the most-bonded atom (often carbon) at the centre and build outward
• Count each atom's remaining bonds, leftover valence means it's not done
• Use double and triple bonds to satisfy atoms that can't reach enough neighbours

Molecule Forge is a chemistry puzzle about valence and bonding, building molecules whose structure obeys the rules of how atoms connect.

• Skills: chemical bonding, valence, molecular structure, Lewis structures
• Best for: roughly grades 9–12 (ages 14+)
• For parents & teachers: bonding and molecular shape made constructive.

Bonding atoms so each one's valence is satisfied, with single, double or triple bonds as needed, is structural chemistry as a fitting problem.

Requiring the structure to match a specific target, not merely be valid, is the original demand.

Valence is what makes molecules combinatorial rather than arbitrary. Carbon forms four bonds, oxygen two, hydrogen one, and those small numbers constrain the possibilities so tightly that most arrangements are simply not chemistry.

Molecule Forge is a chemistry puzzle about valence, bonding and molecular structure. It's an original, free browser game made in-house for PlayPendium.

A free, original browser game on PlayPendium. No download, no install.