Skip to main content
Super TutorResources
Chapter 3 of 9
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Revision Notes

Classification of Elements and Periodicity in Properties

ICSE · Class 11 · Chemistry

Quick revision notes for Classification of Elements and Periodicity in Properties — ICSE Class 11 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

45 questions58 flashcards5 concepts

Interactive on Super Tutor

Studying Classification of Elements and Periodicity in Properties? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.

Try Super Tutor — Free

1,000+ Class 11 students started this chapter today

An infographic explaining the historical need and benefits of classifying elements, such as ease of study, prediction of properties, and systematic organization.
Super Tutor

This is just one of 20+ visuals inside Super Tutor's Classification of Elements and Periodicity in Properties chapter

Explore the full set

Key Topics to Revise

1

1. Need for Classification and Early Attempts

  • About 118 elements are currently known.
  • A systematic study of elements becomes easier when elements with similar properties are grouped together.
  • Dmitri Mendeleev developed the Periodic Law in 1869 and classified elements on the basis of atomic weights.
2

2. Mendeleev's Periodic Law and Table

  • Mendeleev's Periodic Law states that the physical and chemical properties of the elements, as well as the formulae and properties of their compounds, are periodic functions of their atomic weights.
  • Mendeleev arranged elements in increasing order of atomic weights but sometimes ignored this order to keep similar elements together.
  • His table helped predict unknown elements and their properties.
3

3. Modern Periodic Law and Long Form Periodic Table

  • Henry Moseley showed that atomic number is the most fundamental property of an element and is responsible for physical and chemical behaviour.
  • Modern Periodic Law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
  • The long form periodic table is based on atomic number.
4

4. Blocks of the Periodic Table and Electronic Configuration

  • The periodic table is divided into s-block, p-block, d-block, and f-block on the basis of the subshell in which the differentiating electron enters.
  • s-block elements belong to groups 1 and 2 and have valence-shell configuration ns1 or ns2.
  • p-block elements belong to groups 13 to 18 and generally have configuration ns2 np1-6; helium is an exception.

Get complete notes with diagrams and examples

Full Notes

Key Concepts

Elements form many compoundsProut proposed the unitary theoryThe physical and chemical propertiesThe physical and chemical propertiesThe long form periodic table has

Frequently Asked Questions

What are the important topics in Classification of Elements and Periodicity in Properties for ICSE Class 11 Chemistry?
Key topics in Classification of Elements and Periodicity in Properties include Classification of Elements and Periodic Properties - Concept Overview, Periodic Table Overview: Classification of Elements, Development of Periodic Classification - Historical Overview. These are the concepts ICSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in Classification of Elements and Periodicity in Properties — ICSE Class 11 Chemistry?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Classification of Elements and Periodicity in Properties

All 9 chapters — ICSE Class 11 Chemistry Revision Notes

For serious students

Get the full Classification of Elements and Periodicity in Properties chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 11 Chemistry.

Try Super Tutor Free
Try the full chapter — Free