Éléchoc is a chemistry-themed card game that aims to teach players about elements and chemical reactions. Players draw cards representing elements and use action cards to take elements from opponents or form compounds for points. Compounds are formed by stacking element cards and using dice rolls to determine the number of ions present. The player with the highest score after the deck is emptied wins. If there is a tie, players randomly pick cards from each other's hands until one player forms a new compound to win.