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IMPORTANT
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In which of the following options the order of arrangement does not agree with the variation of property indicated against it?
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Important Questions on Classification of Elements and Periodicity in Properties
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The electronic configurations of Eu (Atomic no. ), Gd (Atomic no. ) and Tb (Atomic no. ) are:
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The species and contain the same number of electrons. In which order do their radii increase?
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IMPORTANT
Which of the following orders of ionic radii is correctly represented?
