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प्रश्न
The basicity of oxides and hydroxides of lanthanoids decreases with increase in atomic number due to ______.
रिकाम्या जागा भरा
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उत्तर
The basicity of oxides and hydroxides of lanthanoids decreases with increase in atomic number due to lanthanoid contraction.
Explanation:
As the atomic number increases, the size of lanthanoid ions decreases due to lanthanoid contraction. Smaller ions hold hydroxide ions more tightly, making them less basic.
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