MCQOPTIONS
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| 1. |
Which of the following states that "Properties of elements are a periodic function of their atomic number"? |
| A. | Dobereiner's triads |
| B. | Modern periodic law |
| C. | Newlands's law of octaves |
| D. | Mendeleev's periodic law |
| Answer» C. Newlands's law of octaves | |