Why are d-block elements called transiti...

Why are d-block elements called transition elements ?

Text Solution

Verified by Experts

The name transition elements given to d-block is due to their properties which are transitioned between the electropositive s-block metals and electronegative p-block elements.

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Some statements are given below. Among them, the correct statement are a) All transition elements are d - block elements b) All d- block elements are transition elements c) Helium is a inert gas d) Aluminium is a respresentative element

All are correct

Only a, c and d are correct

Only b,c and d are correct

Only a and c are correct

Zn, Cd and Hg are only 'd' block elements but not transition elements because

They have partly filled 'd'sub shells both in their atomic and ionic states

They have completely filled 'd' sub shells both in their atomic and ionic states

They have fully filled 'd' sub shells only in their atomic states

They have partly filled 'd' sub shells only in their atomic states

(A): Zn is not a transition element. (R) : Elements with incompletely filled d-orbital are called transition elements

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

(A) is false but (R) is true