S block element

Why are the 's-' and 'p-' blocks elements called representative elements?

In s - and p -block elements the OS . changes in units, but in transition elements it changes it chnages in units of one. Explain ?

How do atomic radius generally vary in a period and in a group for s-and p- block elements ? How do you explain the variation?

Which of the following statements is/are incorrect regarding the s-block elements? I. Francium is highly radioactive element. II. Oxides and hydroxides of alkali metals and alkaline alkaline earth metals are not alkaline earth metals are not alkaline in nature. III. Sodium and potassium are the only two s-block elements which are found in large proprtion in biological fluids. IV. Biological function of s-block elements is due to maintanance of ion balance and nerve impulse condition.

Transition elements having more tendency to form complex than representative elements (s and p-block elements) due to:

11 AM JEE Mains 2020 - Chemistry | Periodic Table, s-block & p-block elements - 30 Days Course

First member of each group of representative elements (i.e., s and p-block elements) shows anomalous behaviour. Illustrate with two examples.