The radius of $L a^{3 +}$ (At.No. of La = 57) is 1.06A. Which one of the following given values will be closest to the radius of $L u^{3 +}$ (At.No. of Lu = 71)

1.40A

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1.06A

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0.85A

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1.60A

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Solution

The correct option is C 0.85A
A reduction in atomic/ionic size with increase in atomic number is a characteristic of lanthanoids. Hence, the ionic radius of $L u^{3 +}$ will be smaller than the ionic radius of $L a^{3 +}$ . It will be less than 1.06 A. Hence, the option C, 0.85 A is the correct answer.

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Similar questions

Q. The radius of

{L a}^{3 +}

(Atomic number of

L a = 57

) is

1.06 A

Which one of the following given values will be closest to the radius of

{L u}^{3 +}

(Atomic number of

L u = 71

The radius of $L a^{3 +}$ (At. No. of La = 57) is 1.06 A $^{0}$ . Which one of the following given values will be closest to the radius of $L u^{3 +}$ ?( Atomic number of Lu=71)

Q. The radius of

L a^{+ 3} (Z = 57)

1.06 A^{\circ}

. Which of the following given values is closest to the radius of

L u^{2 +} (Z = 71)

Q. The radius of

L a^{3 +}

(atomic number = 57) is 1.06 A.Which one of the following given values will be closest to the radius of

L u^{3 +}

(atomic number = 71)?

Q. The ionic radius of

_{57} L a^{3 +}

is 1.06 A. Which one of the following given values will be closest to the ionic radius of

_{71} L u^{3 +} ?

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The radius of La3+ (At.No. of La = 57) is 1.06A. Which one of the following given values will be closest to the radius of Lu3+ (At.No. of Lu = 71)

The correct option is C 0.85AA 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 1.06 A. Hence, the option C, 0.85 A is the correct answer.

The radius of $L a^{3 +}$ (At.No. of La = 57) is 1.06A. Which one of the following given values will be closest to the radius of $L u^{3 +}$ (At.No. of Lu = 71)