Which of the following elements do not follow the general trends?
(i) `s`-block elements (ii) `p-`block elements
(iii) `f`-block (iv) `d-`block elements

Options

A. `(i),(ii)`
B. `(ii),(iii)`
C. `(iii)`
D. `(i),(iii),(iv)`

Answer

C

Explanation

The transition metals do not follow the general trends on account of addition of electrons to the `(n - 1)d` subshell. Varations among the transition metals are not as regular as found among the respresentiative elements. We have not included the `f-bloc elements as they are placed in the periodic table in series, not in groups.