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  4. The set that contains atomic number of only transition element is -

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Q. The set that contains atomic number of only transition element is -

JEE MainJEE Main 2020Classification of Elements and Periodicity in Properties

Solution:

$d-$ block elements are considered as transition elements except $Zn , Cd , Hg$.

Here $\operatorname{Sc}(Z=21), \operatorname{Mn}(Z=25),$ Mo $(Z=42)$,

$Hf ( Z =72)$ are transition elements.