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NCERT Solutions class 10 Science 5. Periodic Classification of Elements Chapter Review

Get complete NCERT Solutions for 10 Science 5. Periodic Classification of Elements with detailed explanations. Easy-to-understand answers to help students study effectively and score better.

NCERT Solutions class 10 Science 5. Periodic Classification of Elements Chapter Review

NCERT Solutions class 10 Science 5. Periodic Classification of Elements Chapter Review

Get complete NCERT Solutions for 10 Science 5. Periodic Classification of Elements with detailed explanations. Easy-to-understand answers to help students study effectively and score better.

10 Science Chapter 5. Periodic Classification of Elements - Chapter Review

Preparing for exams becomes easier with Chapter Review. Whether you are studying for board exams or mid-term exams, 10 Science Chapter 5. Periodic Classification of Elements solutions provide quick revising points, well-structured answers, and additional practice material to help you score better.

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5. Periodic Classification of Elements

Chapter Review


Chapter Review:


  • Groups having three elements each. So he called these groups called triads.
  • According to Dobereiner's Traids "The order of increasing atomic masses; the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements".
  • According to Newlands’ Law of Octaves "Every eighth element repeat the properties of the first element".
  • Newlands’ Law of Octaves worked well with lighter elements only.
  • When Mendeleev started work on Periodic Table, oniy 63 elements were known.
  • The Modern Periodic Table has 18 vertical columns known as ‘groups’
    and 7 horizontal rows known as ‘periods’.
  • The Modern Periodic Law state that ‘Properties of elements are a periodic function of their atomic number.’
  • The valency of an element is determined by the number of valence electrons present in the outermost shell of its atom.
  • The atomic size may be visualised as the distance between the centre of the nucleus and the outermost shell of an isolated atom.
  • The atomic radius decreases in moving from left to right along a period. This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.
  • Boron, silicon, germanium, arsenic, antimony, tellurium and polonium are intermediate in properties and are called metalloids or semi   metals.
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📘 Why Chapter Review are Important?

Chapter Review are created by experts to give step-by-step explanations. Around 60–70% of exam questions are based on NCERT concepts. Our 10 Science Chapter 5. Periodic Classification of Elements solutions help you understand the core concepts and practice effectively.

✍️ Quick Revising Points as Notes in Page-1

Revision is the key to exam success. Our notes for 10 Science highlight important formulas, key definitions, and exam-ready points from Chapter 5. Periodic Classification of Elements. These quick revision notes make last-minute preparation easy.

📚 NCERT Exercise Solutions

Every NCERT chapter ends with exercises, and solving them is crucial. Our Chapter Review include complete solutions for 10 Science Chapter 5. Periodic Classification of Elements exercises. With step-by-step answers, you gain clarity and confidence to attempt similar exam questions.

📝 Additional Important Questions & Answers

To boost your preparation, we also provide additional important questions with answers. These are prepared from previous year board papers, sample papers, and important concepts of Chapter 5. Periodic Classification of Elements. Practicing these ensures you are well-prepared for both board and mid-term exams.

🎯 Useful for Board & Mid-Term Exams

Our Chapter Review are useful for both board exams and mid-term exams. For 10 Science, we provide notes, exercises, and important Q&A so that you can revise smartly and write perfect answers in exams.

🌟 Final Words

In short, Chapter Review for 10 Science Chapter 5. Periodic Classification of Elements are a complete study package. With quick revising points, NCERT exercises, and additional important questions, you can prepare effectively for exams. Make these solutions your study companion and excel in your academic journey.

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