Chapter F, Problem B.20E

(a)

Interpretation Introduction

Interpretation:

The block of periodic table to which phosphorus belongs to has to be identified.

Concept Introduction:

Elements that are present in the periodic table can be classified based on the valence electron that is present in the electronic configuration.  The elements present in the periodic table are classified as s-block, p-block, d-block, and f-block elements.  If the valence electron is present in the $s$ orbital, then it is an s-block element, and so on.

This classification can also be done by considering the group number.  Elements present in Group 1 and 2 are known as s-block elements, Group 3 to 12 are known as d-block elements, Group 13 to 18 are known as p-block elements.  f-block elements are known as inner transition elements are present at the bottom of periodic table.

(b)

Interpretation Introduction

Interpretation:

The block of periodic table to which $\text{No}$ belongs to has to be identified.

Concept Introduction:

Refer part (a).

(c)

Interpretation Introduction

Interpretation:

The block of periodic table to which $\text{Po}$ belongs to has to be identified.

Concept Introduction:

Refer part (a).

(d)

Interpretation Introduction

Interpretation:

The block of periodic table to which $\text{Mo}$ belongs to has to be identified.

Concept Introduction:

Refer part (a).

(e)

Interpretation Introduction

Interpretation:

The block of periodic table to which osmium belongs to has to be identified.

Concept Introduction:

Refer part (a).

(f)

Interpretation Introduction

Interpretation:

The block of periodic table to which krypton belongs to has to be identified.

Concept Introduction:

Refer part (a).