Which elements of 3d, 4d, and 5d series are not regarded as transition elements and why ?

What are transition elements ? Which of the d block elements are not regarded as transition elements and why ?

Which of the d-block elements are not regarded as transition elements and why ?

Which of the d - block elements are not regarded as transition element ?

What are the characteristics of the transition elements and why are they called transition elements ? Which of the d - block elements may not be regarded as the transition elements ?

Why d- block elements are known as transition element ?

What are the characteristics of the transition elements and why are they called transition elements? Which of the d-block elements may not be regarded as the transition elements ?

What are the characterstics of the transition elements and why are they called transition elements ? Which of the d-block elements may not be regarded as the transition elements ?

Zn, Cd and Hg are d-block elements but they are not regarded as transition element-why?