MOLECULE MAKER

Everything is made of atoms joined into molecules. Join the atoms with the right bonds and build real molecules!

HOW TO PLAY

Tap an atom button to put an atom on the board. If another atom is picked (it has a yellow ring), the new one joins it with a bond.
To join two atoms on the board, tap one, then tap the other. Tap again to make a double bond, again for a triple bond, and once more to undo it.
Each atom has a number of "hands" (the little dots): H has 1, O has 2, N has 3 and C has 4. Every hand must hold a bond. A double bond uses 2 hands.
Use every atom and join them all into one molecule, then press ✔ Check. Drag atoms to tidy up.
🧪 In Chemist mode the dots are hidden: count the bonds yourself! A wrong check or a hint costs a star.