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| Q.14 | In which year did AEB de Chancourtois organise the elements by atomic weight, by graphing the elements around a cylinder with a circumference of 16 units, corresponding to the weight of oxygen (O)? | |
| Ans | 1. 1860 | |
| 2. 1868 | ||
| 3. 1870 | ||
| 4. 1862 |
Correct Ans Provided: 4
