The radius of La3+ (Z = 57) is 1.06A0. Which one of the following given values will be closest to the radius of Lu3+

A reduction in atomic/ionic size with increase in atomic number is a characteristic of lanthanoids. Hence, the ionic radius of Lu3+ will be smaller than the ionic radius of La3+. It will be less than 1.06Ao. Hence, the option C, 0.85 Ao is the correct answer.

The radius of La3+ (Z = 57) is 1.06A0. Which one of the following given values will be closest to the radius of Lu3+

A reduction in atomic/ionic size with increase in atomic number is a characteristic of lanthanoids. Hence, the ionic radius of Lu3+ will be smaller than the ionic radius of La3+. It will be less than 1.06Ao. Hence, the option C, 0.85 Ao is the correct answer.

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The radius of La³⁺ (Z = 57) is 1.06A⁰. Which one of the following given values will be closest to the radius of Lu³⁺

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0.85A°

1.06A°

1.40A°

1.60A°

answer is D.

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Detailed Solution

A reduction in atomic/ionic size with increase in atomic number is a characteristic of lanthanoids. Hence, the ionic radius of Lu³⁺
will be smaller than the ionic radius of La³⁺
. It will be less than 1.06A^o. Hence, the option C, 0.85 A^o is the correct answer.

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