Structura: Element Synthesis

LEARN CHEMICAL REACTIONS WITH A FALLING-BLOCK PUZZLE

Drop elements and ions, place them side by side, and they combine.

H plus O makes −OH. Add another H and you have H₂O.

A compound forms only when the bonds and charges add up.

Instead of turning textbook pages, you build each reaction with your own hands.

WHAT'S INSIDE

356 reactions across inorganic, organic and polymer chemistry (308 in the Codex), in 46 stages.

- From atoms to molecules

- Making gases, and the halogens

- Metals, oxides and industrial methods (contact process, Ostwald process, ammonia-soda process, blast furnace)

- Acids, bases, neutralization and salts

- Redox and ionization tendency (permanganate, dichromate, iodometric titration)

- Metal ion precipitates and complex ions

- Aliphatic compounds (oxidizing alcohols, esterification, silver mirror test, iodoform test)

- Aromatic compounds (nitration, sulfonation, diazotization, azo dyes, cumene process)

- Polymers (sugars, amino acids, protein tests, resins, rubber, vinylon)

This app is about reactions. It does not cover calculation topics such as moles, equilibrium, electrochemistry, thermochemistry or crystal lattices.

The content follows the Japanese high school chemistry curriculum, so some topics and terms may differ from your course.

BUILT TO BE SEEN

Benzene is drawn as a hexagon, glucose as a ring, starch as linked rings.

Precipitates sink to the bottom and gases escape upward, in their real colors.

PRACTICE RECALLING

- A 3-question quiz after each stage, with the product hidden

- A Test mode in the Codex that masks the products

- Reactions you miss come back in later quizzes, and their materials fall more often

SET UP THE CONDITIONS YOURSELF

Heat, electrolysis, light and catalysts are devices you use on the whole flask. You decide when to use them.

FREE EXPERIMENT MODE

With the full unlock, choose what falls, in the order you like, and try your own combinations. No targets and no material limit.

MEET THE ELEMENTS

Each of the 46 stages introduces a character who teaches the key point of that topic, in a short conversation with Mol, an apprentice chemist.

PRICING

Units 1-3 (14 stages, 91 Codex entries) are free.

A one-time purchase unlocks everything else.

- No additional charges

- No subscriptions

- No ads

- No gacha

- No stamina