Description: Composer des molécules d'atomes.

Instructions: Votre travail consiste à composer une molécule en utilisant tous les atomes. Commencer à composer en appuyant sur le bouton gauche de la souris sur l'un des atomes. Déplacez votre souris à un autre atome se joindre à eux. You have six types of atoms and each type has its own valency from 1 to 6. The level is complete when all valencies of each atom are used. The numbers near atoms show the number of used valencies and full valency as well. You can change type of atom by clicking it (remember, it costs one point).