Write mandleev periodic law and write amomalous pair of elements.
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the law is in attachment
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Amomalous pair of elements
Some elements with higher atomic weight were placed before low atomic weight elements in order to maintain similar chemical nature of elements and are called inverted pairs or anomalous pairs. Anomalous pairs of Mendeleev's periodic table are Ar−K,Co−Ni,Te−I,Th−Pa.
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