The Lanthanoid contraction refers to decrease in the:
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Ionic radius of the series.
Explanation:
The Lanthanoid contraction refers to decrease in the ionic radius of the series. It is a reduction in atomic/ionic size with increase in atomic number. This is due to poor shielding of 4f electrons.
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Interstitial compounds are formed when small atoms are trapped inside the crystal lattice of metals. Which of the following is not the characteristic property of interstitial compounds?