2 a) b) c) Moseley/ Dobereiner/ Newland मोजले डोबेरायनर | न्यूलँड्स Triads /त्रिके O O 0 0 Octave | अष्टके O O Atomic number
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1) Triads
- b) Dobereiner
2) Octave
- e) Newland
3) Atomic number
- d) Moseley
4) Atomic mass number
- a) Mendeleev
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