1. Tardigrade
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  3. Chemistry
  4. In Mendeleev’s periodic table some pairs of elements do not follow increasing order of atomic weight known as anomalous pair. The correct example of anomalous pair is

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Q. In Mendeleev’s periodic table some pairs of elements do not follow increasing order of atomic weight known as anomalous pair. The correct example of anomalous pair is

Classification of Elements and Periodicity in Properties

Solution:

Atomic weight of $Th = 232$
Atomic weight of $Pa = 231$