| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | na2s | chemistry labs | Used as a reagent in chemistry labs for various chemical reactions | 1 |
| 2 | nicl2 | chemistry lab in most countries | nicl2 is commonly used in chemical experiments and solutions as a source of nickel and chloride ions. | 1 |
| 3 | nicl2 | chemistry laboratory | Used as a source of nickel(II) ions in chemical reactions and experiments. | 1 |