how do you correct the atomic weight of an element and anonymous series by using mendeleev periodic table
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Anomalous pairs are those pairs of elements in which the increasing order of atomic masses was not obeyed. Mendeleev placed these elements according to a similarity in properties and not in the increasing order of their atomic mass.
(A) Ar ( at mass = 39.9) is placed before K (at mass = 39.1)
(B) Co (at mass = 58.9) is placed before Ni (at mass = 58.6)
(C) Te (at mass = 127.6 ) is placed before I (at mass = 126.9).
(D) Al and Si is not anomalous pair of elements in the Mendeleev's periodic table. Al (at mass = 27.0) is placed before Si (at mass = 28.4)
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