# Structura 元素合成 ― 化学反応を覚えるパズル > A puzzle game where you connect falling elements to create substances. You can learn 356 inorganic, organic, and polymer reactions while actively playing. Units 1-3 are free. Canonical page: [https://chrome-stats.com/d/jp.snaplace.structura](https://chrome-stats.com/d/jp.snaplace.structura) ## Overview - **ID:** `jp.snaplace.structura` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** SNAPLACE - **Category:** GAME\_PUZZLE - **Downloads:** 80 - **Last updated:** 2026-08-27 - **First published:** 2026-08-22 - **Publisher country:** JP - **Data as of:** 2026-09-23 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=jp.snaplace.structura) - **Website:** [https://snaplace-corp.jp/structura/](https://snaplace-corp.jp/structura/) - **Privacy policy:** [https://snaplace-corp.jp/pp\_structura/](https://snaplace-corp.jp/pp_structura/) ## Description ■ Learn Chemical Reactions with Falling Block Puzzles
Simply place the falling elements and ions next to each other to connect them.
When H and O combine, they form -OH; with another H, they form H₂O.
Substances are formed only when the number of bonds and the charge balance out.
All you need to remember is "what is created when A and B are combined."
Instead of flipping through textbook pages, you build the puzzles with your hands.

■ Coverage
356 inorganic, organic, and polymer reactions (308 in the illustrated guide), 46 stages.
• From Atoms to Molecules
• Gas Production Methods and Halogens
• Metals, Oxides, and Industrial Production Methods (Contact Process, Ostwald Process, Ammonia-Soda Process, Blast Furnace)
• Acids and Bases, Neutralization, and Salts
• Redox and Ionization Tendency (Potassium Permanganate, Potassium Dichromate, Iodine Titration)
• Precipitation of Metal Ions and Complex Ions (Precipitation Color, Systematic Separation)
• Aliphatic Ions (Oxidation of Alcohols, Esterification, Silver Mirror Reaction, Iodoform Reaction)
• Aromatic Ions (Nitration, Sulfonation, Diazotation, Azo Dyes, Cumene Process)
• Polymers (Color Reactions of Sugars, Amino Acids, and Proteins, Synthetic Resins, Rubber, Vinylon)

*This work deals with "reactions." It does not include calculation problems in theoretical chemistry such as mole calculations, chemical equilibrium, electrochemistry, thermochemistry, or crystal lattices.

■ Made easy to understand
Benzene rings are hexagonal, glucose is a ring, and starch is a chain of three linked rings.

Instead of just listing terms, the structures are illustrated.

Precipitates sink to the bottom, and gases rise to the top. The colors are also depicted as they are.

■ Practice recalling
Simply looking at it only leads to "I can see it."

• A short quiz (3 questions) after each stage. The products are hidden, and you answer from four choices.

• The "Test" button in the encyclopedia hides the products of reactions you've memorized.

• Incorrectly answered reactions are recorded and prioritized for the next quiz.

• Furthermore, the materials for those reactions are more likely to fall onto the board. You'll touch them when you least expect it.

■ Elemental Characters
Each of the 46 stages features a character who teaches you the key points of that unit.
Sodium is surrounded by a yellow flame, fluorine boasts the strongest oxidizing power, and
silica gel appears as a stone that drinks water.
Each stage begins with a short conversation with the protagonist, "Mole."

■ Price
Units 1-3 (14 stages, 91 entries in the encyclopedia) are free. You can play through the entire process, including how to prepare gases.

The rest is unlocked with a one-time purchase of ¥500.

• No additional charges
• No subscriptions
• No ads
• No gacha (loot boxes)
• No stamina (play as much as you like)

■ For people who:
• Struggle to memorize inorganic chemistry and get stuck
• Have trouble remembering precipitate colors and gas preparation methods
• Want to understand organic reaction systems systematically
• Want to review quickly in their spare time ## Rankings - #2,091,426 — Overall ## Similar extensions and apps - [Alcyone: Chemistry Puzzle](https://chrome-stats.com/d/io.boilstudio.alcyone) — 571 users, 5.00 / 5 - [Valence Science Puzzle](https://chrome-stats.com/d/com.zuardyan.valence) — 22 users - [Puzzle & Chemical](https://chrome-stats.com/d/com.nifty.mbr.properlab.puzchemi) — 28 users - [Molecule: Chemistry Puzzle](https://chrome-stats.com/d/com.versus.molecula) — 51 users - [Alchemist Wilds: Chem Puzzles](https://chrome-stats.com/d/com.rythpixel.alchemistwilds) - [Chemistry Lab : Compounds Game](https://chrome-stats.com/d/com.monsterbraingames.chemistrylabsciencegame) — 192,081 users, 3.49 / 5 - [Adam the Chemist](https://chrome-stats.com/d/com.adamthechemist.app) — 37 users - [ChemPour: Reaction Lab](https://chrome-stats.com/d/com.kaansayin.chemistrytuple) — 19 users - [NexaFuse](https://chrome-stats.com/d/com.hypgiq.nexafuse.eduqrmkfzt) - [Formula Mix Sort](https://chrome-stats.com/d/com.formula.mix.sort.w4d7.p6z2) — 999 users - [Elemix](https://chrome-stats.com/d/com.realsem.elemix) — 5 users - [Nucleus - Hex Merge puzzle](https://chrome-stats.com/d/com.kebapstudios.nucleus) — 2,227 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/jp.snaplace.structura)