| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | protium | chemistry enthusiasts in specific countries | In certain countries with advanced research in physics and chemistry, protium isotopes are used in cutting-edge experiments and technologies. | 1 |
| 2 | stoichiometry | chemistry enthusiasts | Stoichiometry is a fundamental tool for analyzing and predicting the quantitative aspects of chemical reactions, crucial for understanding the conservation of mass in chemical processes | 1 |