5. Periodic Classification of Elements-Modern Periodic Table Science Class 10 In English-CBSE Notes
Explore science cbse notes for Class 10 Chapter 5. Periodic Classification of Elements Topic Modern Periodic Table in English medium for exams preparation.
5. Periodic Classification of Elements-Modern Periodic Table Science Class 10 In English-CBSE Notes
Popular Topics Covered
Our study material includes
- cbse notes for class 10 science chapter 5. Periodic Classification of Elements topic Modern Periodic Table in english
- class 10 science chapter 5. Periodic Classification of Elements cbse notes
- cbse class 10 science chapter 5. Periodic Classification of Elements notes in english
- class 10 science chapter 5. Periodic Classification of Elements study notes
- class 10 science chapter 5. Periodic Classification of Elements revision notes
- cbse notes for class 10 science chapter 5. Periodic Classification of Elements
- class 10 science chapter 5. Periodic Classification of Elements summary notes
- cbse class 10 science chapter 5. Periodic Classification of Elements quick notes
All Topics Chapter 5. Periodic Classification of Elements
Notes
5. Periodic Classification of Elements-Modern Periodic Table Science Class 10 In English-CBSE Notes
5. Periodic Classification of Elements
Modern Periodic Table
Chapter 5. Periodic Classification of Elements
Modern Periodic Table:
Atomic number of an element is more fundamental properties than its atomic masses.
In 1913, Henry Moseley showed that the atomic number of an element is a more fundamental property than its atomic mass as described below. Accordingly, Mendeleev’s Periodic Law was modified and atomic number was adopted as the basis of Modern Periodic Table.
The atomic number gives us the number of protons in the nucleus of an atom and this number increases by one in going from one element to the next. Elements, when arranged in order of increasing atomic number Z, lead us to the classification known as the Modern Periodic Table.
Modern Periodic Law:
‘Properties of elements are a periodic function of their atomic number in modern periodic table.’ This law is known as modern periodic law.
Position of Elements in the Modern Periodic Table :
The Modern Periodic Table has 18 vertical columns known as ‘groups’
and 7 horizontal rows known as ‘periods’.
Distinguish between Modern and Mendeleev’s Periodic table.
| Modern Periodic table | Mendeleev’s Periodic table |
| (1) Elements are arranged in increasing order of their atomic numbers. (2) There are 18 column and 7 raw. (3) Isotopes are kept at the same place of their corresponding elements as they have same atomic numbers. (4) There are no anomalies in the modern periodic table. | (1) Elements are arranged in increasing order of their atomic masses. (2) There are 8 column and 6 raw. (3) There is no position explained for isotopes. (4) Mendeleev’s periodic table had a number of anomalies or defects. |
The Position of Noble Gases:
Noble gases are placed in a separates group.
There are following reasons to place the noble gases in a separate group:
(i) Isotopes were discovered long after Mendeleev's periodic table, but they could be placed in without changing the previous table's setting.
(ii) These all are similar properties and they are very unreactive becausetheir valency is zero.
(iii) Their octaves are completed and they do not make any partnership to any element. They are also monoatomic.
Groups:
Groups in the Periodic Table signify an identical outershell electronic configuration. On the other hand, the number of shells increases as we go down the group.
Elements have same valence electrons in a same group.
Periods:
When we move forward in a period then we see that:
(i) These elements do not have the same number of valence electrons, but they contain the same number of shells.
(ii) The number of valence shell electrons increases by one unit, as the atomic number increases by one unit on moving from left to right in a period.
(iii) Each period marks a new electronic shell getting filled.
(iv) The maximum number of electrons that can be accommodated in a shell depends on the formula 2n2 where ‘n’ is the number of the given shell from the nucleus.
There are only 8 elements in 2nd and 3rd periods as L and M shell are filled which can not be filled more than 8 electrons.
Position of elements in Modern Periodic Table:
The position of an element in the Periodic Table tells us about its chemical reactivity. As you have learnt, the valence electrons determine the kind and number of bonds formed by an element.
Valency : As you know, the valency of an element is determined by the
number of valence electrons present in the outermost shell of its atom.
All Topics Chapter 5. Periodic Classification of Elements
5. Periodic Classification of Elements-Modern Periodic Table Science Class 10 In English-CBSE Notes
Hindi Medium Students/Teachers/Tutors:
All Chapters science Class 10
CBSE Notes for Class 10 science Chapter 5. Periodic Classification of Elements – Modern Periodic Table
The CBSE Notes for Class 10 science Chapter 5. Periodic Classification of Elements – Modern Periodic Table are prepared to help students understand every concept in a simple, clear, and well-organized manner. These notes are based on the latest CBSE syllabus and are suitable for regular classroom learning, homework, revision, and examination preparation. Every topic is explained using easy language so that students can learn important concepts without difficulty and develop a strong academic foundation.
Studying directly from the textbook is essential, but during revision students often need concise study material that highlights only the most important information. These chapter-wise notes provide exactly that. Instead of reading lengthy chapters repeatedly, students can quickly revise definitions, concepts, facts, examples, and important points in a short period of time. This approach saves valuable study time while improving understanding and retention.
Why Study Chapter 5. Periodic Classification of Elements – Modern Periodic Table Using Our Notes?
Every chapter contains several important concepts that require careful understanding. Our notes present these concepts in a logical sequence so students can connect ideas easily. Difficult topics are simplified with easy explanations, making learning enjoyable for students of different learning abilities. Whether you are preparing for classroom discussions, assignments, periodic tests, or annual examinations, these notes provide a reliable source for effective revision.
- Prepared according to the latest CBSE curriculum.
- Simple and student-friendly explanations.
- Chapter-wise organized content for easy learning.
- Important concepts, definitions, and key points included.
- Useful for quick revision before examinations.
- Supports self-study and classroom learning.
- Helps improve conceptual understanding and confidence.
- Suitable for homework, assignments, and test preparation.
Benefits of Reading CBSE Notes Regularly
Consistent revision is one of the most effective ways to achieve academic success. Reading CBSE Notes for Class 10 science Chapter 5. Periodic Classification of Elements – Modern Periodic Table regularly helps students remember important information for a longer period. Since the content is arranged systematically, students can identify important topics quickly and revise them whenever required.
These notes also help students improve answer-writing skills by presenting information in a structured format. Instead of memorizing lengthy paragraphs, students learn how to organize answers using important points and concepts. This not only improves writing quality but also increases confidence during examinations.
How to Use These Notes Effectively
To get the best results, students should first read the NCERT textbook carefully and understand the chapter. After completing the textbook, they should study these notes to reinforce important concepts. During revision, students can focus on highlighted definitions, important facts, and key ideas before solving textbook exercises and practice questions. This learning strategy improves both understanding and long-term memory.
Teachers and parents can also use these notes as a quick reference while helping students revise lessons or complete assignments. Since the content is concise and well-organized, it becomes easier to explain difficult topics within a limited amount of time.
Features of Our CBSE Notes
Every chapter on our platform is created with the objective of making learning easier for students. Our educational team regularly reviews and updates the content according to the latest CBSE guidelines so that students always receive reliable and accurate study material.
- Easy-to-understand chapter explanations.
- Important definitions and key concepts.
- Well-structured content for faster revision.
- Based on the latest CBSE syllabus.
- Helpful for school exams and annual examinations.
- Free online access on desktop and mobile devices.
Prepare Better with Chapter-wise CBSE Notes
Success in examinations depends on consistent practice and smart revision. These CBSE Notes for Class 10 science Chapter 5. Periodic Classification of Elements – Modern Periodic Table are designed to reduce study pressure by presenting important information in a concise and meaningful way. Students can use them throughout the academic session for daily learning as well as last-minute revision before examinations.
Along with these notes, students are encouraged to solve NCERT textbook questions, practice important questions, and attempt sample papers regularly. Combining concept-based learning with regular practice helps improve problem-solving ability, analytical thinking, and overall academic performance. With disciplined study habits and quality learning resources, students can build confidence, strengthen their understanding of every chapter, and achieve excellent results in school examinations.
5. Periodic Classification of Elements-Modern Periodic Table Science Class 10 In English-CBSE Notes Study Materials For Class 6 to 12
If you want to improve your academic performance, start studying with free CBSE notes for all classes. These notes are designed to make learning simple, clear, and effective for every student. Choose your class, explore the chapters, and begin your preparation with the latest cbse notes today.
