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Atomic and Ionic Sizes of Lanthanides

Define chemic...

Question

Define chemical twins. Write general electronic configuration of actinoids.

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Solution

Chemical twins $\to$ Chemical twins are those in which the properties of some elements are same. Atomic size of Zr and Hf , Nb and Ta are similar. This is due to Lanthanide contraction.
General electronic configuration of actinoids- $[R n] 5 f^{0 - 14} 6 d^{0 - 2} 7 s^{2}$

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Atomic and Ionic Sizes of Lanthanides

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