NCERT Class 11 Chemistry The p Block Elements

Read and download NCERT Class 11 Chemistry The p Block Elements in NCERT book for Class 11 Chemistry. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Chemistry textbook for Class 11 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 11 Chemistry to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 11 Chemistry Chapter 11 The pBlock Elements

Class 11 Chemistry students should refer to the following NCERT Book Chapter 11 The pBlock Elements in Class 11. This NCERT Book for Class 11 Chemistry will be very useful for exams and help you to score good marks

Chapter 11 The pBlock Elements NCERT Book Class 11

THE p -BLOCK ELEMENTS

In p-block elements the last electron enters the outermost p orbital. As we know that the number of p orbitals is three and, therefore, the maximum number of electrons that can be accommodated in a set of p orbitals is six. Consequently there are six groups of p–block elements in the periodic table numbering from 13 to 18. Boron, carbon, nitrogen, oxygen, fluorine and helium head the groups. Their valence shell electronic configuration is ns2np1-6(except for He). The inner core of the electronic configuration may, however, differ.

The difference in inner core of elements greatly influences their physical properties (such as atomic and ionic radii, ionisation enthalpy, etc.) as well as chemical properties. Consequently, a lot of variation in properties of elements in a group of p-block is observed. The maximum oxidation state shown by a p-block element is equal to the total number of valence electrons (i.e., the sum of the sand p-electrons). Clearly, the number of possible oxidation states increases towards the right of the periodic table.

In addition to this so called group oxidation state, p-block elements may show other oxidation states which normally, but not necessarily, differ from the total number of valence electrons by unit of two. The important oxidation states exhibited by p-block elements are shown in Table 11.1. In boron, carbon and nitrogen families the group oxidation state is the most stable state for the lighter elements in the group. However, the oxidation state two unit less than the group oxidation state becomes progressively more stable for the heavier elements in each group.

The occurrences of oxidation states two unit less than the group oxidation states are sometime attributed to the ‘inert pair effect’. The variation in properties of the p-block elements due to the influence of d and f electrons in the inner core of the heavier elements makes their chemistry interesting The relative stabilities of these two oxidation states – group oxidation state and two unit less than the group oxidation state – may vary from group to group and will be discussed at appropriate places.

It is interesting to note that the non-metals and metalloids exist only in the p-block of the periodic table. The non-metallic character of elements decreases down the group. In fact the heaviest element in each p-block group is the most metallic in nature. This change from nonmetallic to metallic character brings diversity in the chemistry of these elements depending on the group to which they belong. 

In general, non-metals have higher ionisation enthalpies and higher electronegativities than the metals. Hence, in contrast to metals which readily form cations, non-metals readily form anions. The compounds formed by highly reactive non-metals with highly reactive metals are generally ionic because of large differences  in their electronegativities.

On the other hand,compounds formed between non-metals themselves are largely covalent in character because of small differences in their electronegativities. The change of non-metallic to metallic character can be best illustrated by the nature of oxides they form. The non-metal oxides are acidic or neutral whereas metal oxides are basic in nature. 

The first member of p-block differs from the remaining members of their corresponding group in two major respects. First is the size and all other properties which depend on size. Thus, the lightest p-block elements show the same kind of differences as the lightest s-block elements, lithium and beryllium. The second important difference, which applies only to the p-block elements, arises from the effect of dorbitals in the valence shell of heavier elements (starting from the third period onwards) and their lack in second period elements.

The second period elements of p-groups starting from boron are restricted to a maximum covalence of four (using 2s and three 2p orbitals). In contrast, the third period elements of p-groups with the electronic configuration 3s23pn have the vacant 3d orbitals lying between the 3p and the 4s levels of energy. Using these d-orbitals the third period elements can expand their covalence above four. For example, while boron forms only [BF4]–, aluminium gives [AlF6]3– ion. The presence of these d-orbitals influences the chemistry of the heavier elements in a number of other ways.

 

Please refer to attached file for NCERT Class 11 Chemistry The p-Block Elements

Chapter 01 Some Basic Concepts of Chemistry
NCERT Class 11 Chemistry Some Basic Concepts Of Chemistry
Chapter 02 Structure of Atom
NCERT Class 11 Chemistry Structure of Atom
Chapter 03 Classification of Elements and Periodicity in Properties
NCERT Class 11 Chemistry Classification of Elements and Periodicity In Properties
Chapter 04 Chemical Bonding and Molecular Structure
NCERT Class 11 Chemistry Chemical Bonding and Molecular Structure
Chapter 05 States of Matter
NCERT Class 11 Chemistry State Of Matter
Chapter 06 Thermodynamics
NCERT Class 11 Chemistry Thermodynamics
Chapter 08 Redox Reactions
NCERT Class 11 Chemistry Redox Reactions
Chapter 10 The s-Block Elements
NCERT Class 11 Chemistry The s Block Elements
Chapter 11 The p-Block Elements
NCERT Class 11 Chemistry The p Block Elements
Chapter 12 Organic Chemistry – Some Basic Principles & Techniques
NCERT Class 11 Chemistry Organic Chemistry Some Basic Priciples and Techniques
Chapter 14 Environmental Chemistry
NCERT Class 11 Chemistry Environmental Chemistry
Part I Answer to Some Selected Problems
NCERT Class 11 Chemistry Answer of Some Selected Problems
Part II Answer to Some Selected Problems
NCERT Class 11 Chemistry Answer to Some Selected Problems

Chemistry NCERT Book Class 11 Chapter 11 The pBlock Elements

The above NCERT Books for Class 11 Chemistry Chapter 11 The pBlock Elements have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 11 The pBlock Elements Chemistry Class 11 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 11 The pBlock Elements NCERT etextbooks as the exams for Class 11 Chemistry are always asked as per the syllabus defined in these ebooks. These Class 11 Chapter 11 The pBlock Elements book for Chemistry also includes collection of question. We have also provided NCERT solutions for Class 11 Chemistry which have been developed by teachers of StudiesToday.com after thorough review of the latest book and based on pattern of questions in upcoming exams for Class 11 students.

NCERT Book Class 11 Chemistry Chapter 11 The pBlock Elements

The latest NCERT book for Chapter 11 The pBlock Elements pdf have been published by NCERT based on the latest research done for each topic which has to be taught to students in all classes. The books for Class 11 Chemistry Chapter 11 The pBlock Elements are designed to enhance the overall understanding of students. All Class 11 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 11 students. 

Chapter 11 The pBlock Elements NCERT Book Class 11 Chemistry

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Class 11 Chemistry Chapter 11 The pBlock Elements NCERT Book

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Class 11 Chapter 11 The pBlock Elements NCERT Book Chemistry

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