Read and download NCERT Class 12 Chemistry The P Block Elements in NCERT book for Class 12 Chemistry. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Chemistry textbook for Class 12 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 12 Chemistry to understand the answers of the exercise questions given at the end of this chapter
NCERT Book for Class 12 Chemistry The P Block Elements
Class 12 Chemistry students should refer to the following NCERT Book The P Block Elements in Class 12. This NCERT Book for Class 12 Chemistry will be very useful for exams and help you to score good marks
The P Block Elements NCERT Book Class 12
In Class XI, you have learnt that the p-block elements are placed in groups 13 to 18 of the periodic table. Their valence shell electronic configuration is ns2np1–6 (except He which has 1s2 configuration). The properties of p-block elements like that of others are greatly influenced by atomic sizes, ionisation enthalpy, electron gain enthalpy and electronegativity. The absence of dorbitals in second period and presence of d and/or f orbitals in heavier elements (starting from third period onwards) have significant effects on the properties of elements. In addition, the presence of all the three types of elements; metals, metalloids and non-metals bring
diversification in chemistry of these elements. Having learnt the chemistry of elements of Groups 13 and 14 of the p-block of periodic table in Class XI, you will learn the chemistry of the elements of subsequent groups in this Unit.
Group 15 includes nitrogen, phosphorus, arsenic, antimony and bismuth. As we go down the group, there is a shift from non-metallic to metallic through metalloidic character. Nitrogen and phosphorus are non-metals, arsenic and antimony metalloids and bismuth is a typical metal.
Occurrence
Molecular nitrogen comprises 78% by volume of the atmosphere. In the earth’s crust, it occurs as sodium nitrate, NaNO3 (called Chile saltpetre) and potassium nitrate (Indian saltpetre). It is found in the form of proteins in plants and animals. Phosphorus occurs in minerals of the apatite family, Ca9(PO4)6. CaX2 (X = F, Cl or OH) (e.g., fluorapatite Ca9 (PO4)6. CaF2) which are the main components of phosphate rocks. Phosphorus is an essential constituent of animal and plant matter. It is present in bones as well as in living cells. Phosphoproteins are present in milk and eggs. Arsenic, antimony and bismuth are found mainly as sulphide minerals.
Electronic Configuration
The valence shell electronic configuration of these elements is ns2np3. The s orbital in these elements is completely filled and p orbitals are half-filled, making their electronic configuration extra stable.
Atomic and Ionic Radii
Covalent and ionic (in a particular state) radii increase in size down the group. There is a considerable increase in covalent radius from N to P. However, from As to Bi only a small increase in covalent radius is observed. This is due to the presence of completely filled d and/or f orbitals in heavier members.
Ionisation Enthalpy
Ionisation enthalpy decreases down the group due to gradual increase in atomic size. Because of the extra stable half-filled p orbitals electronic configuration and smaller size, the ionisation enthalpy of the group 15 elements is much greater than that of group 14 elements in the corresponding periods.
Please refer to attached file for NCERT Class 12 Chemistry The P Block Elements
| NCERT Class 12 Chemistry Answers and Solutions |
| NCERT Class 12 Chemistry Appendix I |
| NCERT Class 12 Chemistry Appendix II |
| NCERT Class 12 Chemistry Appendix III |
| NCERT Class 12 Chemistry Logarithms |
| NCERT Class 12 Chemistry Logarithms Appendix IV |
| NCERT Class 12 Chemistry Part 1 The Solid State |
| NCERT Class 12 Chemistry The Solid State |
| NCERT Class 12 Chemistry Solutions |
| NCERT Class 12 Chemistry Electrochemistry |
| NCERT Class 12 Chemistry Chemical Kinetics |
| NCERT Class 12 Chemistry Surface Chemistry |
| NCERT Class 12 Chemistry General Principles and Processes of Isolation of Elements |
| NCERT Class 12 Chemistry The P Block Elements |
| NCERT Class 12 Chemistry The d and f Block Elements |
| NCERT Class 12 Chemistry Coordination Compounds |
| NCERT Class 12 Chemistry Haloalkanes and Haloarenes |
| NCERT Class 12 Chemistry Alcohols Phenols and Ethers |
| NCERT Class 12 Chemistry Aldehydes Ketones and Carboxylic Acids |
| NCERT Class 12 Chemistry Amines |
| NCERT Class 12 Chemistry Biomolecules |
| NCERT Class 12 Chemistry Polymers |
| NCERT Class 12 Chemistry Chemistry in Everyday Life |
Chemistry NCERT Book Class 12 The P Block Elements
The above NCERT Books for Class 12 Chemistry The P Block Elements have been published by NCERT for latest academic session. The textbook by NCERT for The P Block Elements Chemistry Class 12 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to The P Block Elements NCERT etextbooks as the exams for Class 12 Chemistry are always asked as per the syllabus defined in these ebooks. These Class 12 The P Block Elements book for Chemistry also includes collection of question. We have also provided NCERT solutions for Class 12 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 12 students.
NCERT Book Class 12 Chemistry The P Block Elements
The latest NCERT book for The P Block 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 12 Chemistry The P Block Elements are designed to enhance the overall understanding of students. All Class 12 NCERT textbooks have been written in an easy to understand language which will help to enhance the overall level of Class 12 students.
The P Block Elements NCERT Book Class 12 Chemistry
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Class 12 Chemistry The P Block Elements NCERT Book
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Class 12 The P Block Elements NCERT Book Chemistry
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