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Uses of Lanthanides

X -α⟶ Y -β⟶ Z...

Question

$X - α - - \to Y - β - \to Z - β - \to W$
In the above sequence of reaction, the elements which are isotopes of each other are

X and W

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Y and Z

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X and Z

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None of these

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Solution

The correct option is A X and W
Isotopes are formed by the emission of one $α$ - and two $β$ -particles respectively.

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