P block elements

Why the f -block elements are called inner transition elements?

The f -block elements of the periodic table contains those element in which

In the long or modern form of the periodic table, the element in the periodic table have been divided into four blocks, s-p-d -and f -. Each period begins with the filling of new energy shell. Two series of f -block elements are placed at the bottom of the periodic table. The element with Z=39 belongs to

How many s -block elements are known ?

For d block elements the first ionization potential is of the order

D and F block elements

D and f block elements

All transition elements are d-block elements, but all d-block elements are not transition elements. Which the following is true.

Number of s-block elements are:

In case of d-block elements