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  3. Chemistry
  4. Mendeleev's left the gap under aluminium and a gap under silicon having atomic weights 68 and 72 respectively. These elements respectively are

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Q. Mendeleev's left the gap under aluminium and a gap under silicon having atomic weights $68$ and $72$ respectively. These elements respectively are

Classification of Elements and Periodicity in Properties

Solution:

Correct answer is (a) Eka-aluminium and Eka-silicon