Junior Edition
Pick two element heroes. Save the city. Learn real chemistry by accident.
Mendeleev City needs you
He wants to melt down the Periodic Table. Two element heroes can stop him.
Pick a stage
Tap an open stage to play it again.
Make your own hero
Pick an element that is not a hero yet.
Element Cards
Find an element, play it, or use it in a reaction to get its card.
Top Trumps
On a tablet? Drag on the left of the screen to run, tap the right to jump, and the big round buttons do the rest.
How hard should it be?
More angry Uraniums = harder. You can change this any time.
Tap any two heroes
Stage 1
District saved
Question 1 of 3
City saved
Elements found
Helium says: every bright square in here is a real element. He is number two.
Swipe to turn the page.Drag the corner to turn the page.
found still to meet not in the game
Tap any square to hear about it.
Reactions made
Tap a reaction to read what happened.
Stickers
0 of 5 found
Find these five on the Lab Bench. Each clue is about what the reaction makes.
A new five every Monday.
0 coins
Coins are earned by playing. They can't be bought.
Reactions found
Tap two heroes and see what really happens.
The lab had a little accident. Reload and you'll be right back in — your stickers are saved.