Skip to main content
Super TutorResources
Chapter 3 of 5
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Syllabus

Classification of Elements and Periodicity in Properties

Punjab Board · Class 11 · Chemistry

Complete topic list for Classification of Elements and Periodicity in Properties in Punjab Board Class 11 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.

45 questions30 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 syllabus 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 22+ visuals inside Super Tutor's Classification of Elements and Periodicity in Properties chapter

Explore the full set
4 Topics · Punjab Board Class 11 Chemistry

Topics in Classification of Elements and Periodicity in Properties

1

Historical Development of the Periodic Table

  • In 1800, only 31 elements were known; today 118 elements have been discovered.
  • Johann Döbereiner (1829): Law of Triads – groups of three elements where the middle element's atomic weight is roughly the average of the other two, and its properties are intermediate. Examples: Li-N
  • A.E.B. de Chancourtois (1862): Arranged elements in order of increasing atomic weights on a cylinder (helical arrangement).
2

Modern Periodic Table – Structure and Organisation

  • The modern Periodic Table (long form) has 7 horizontal rows called Periods and 18 vertical columns called Groups.
  • Groups are numbered 1 to 18 as per IUPAC 1984 recommendation (replacing IA–VIIA, VIII, IB–VIIB, 0).
  • Period number = highest principal quantum number (n) of elements in that period.
3

IUPAC Nomenclature of Elements with Z > 100

  • IUPAC provides a systematic temporary naming system for newly discovered elements with Z > 100.
  • Numerical roots are used: 0=nil, 1=un, 2=bi, 3=tri, 4=quad, 5=pent, 6=hex, 7=sept, 8=oct, 9=enn.
  • The suffix 'ium' is added at the end of the combined roots.
4

Electronic Configurations and Blocks of Elements

  • The position of an element in the Periodic Table directly reflects the quantum numbers of the last orbital filled.
  • s-Block Elements: Groups 1 and 2 (ns¹ and ns²). Alkali metals and Alkaline earth metals. Highly reactive metals. Low ionization enthalpies. React vigorously with water. Example: Na, K, Mg, Ca.
  • p-Block Elements: Groups 13 to 18 (ns²np¹ to ns²np⁶). Includes metals, non-metals, and metalloids. Noble gases have completely filled orbitals (ns²np⁶) – very low reactivity.

Key Concepts

The Periodic Law states that 'theThe modern Periodic Table consistsThe periodic nature of elements directlyElements are classified based onAtomic radius generally decreases across

Frequently Asked Questions

What are the important topics in Classification of Elements and Periodicity in Properties for Punjab Board Class 11 Chemistry?
Key topics in Classification of Elements and Periodicity in Properties include Periodic Table Organization and Classification, Historical Development of the Periodic Table, Chapter Overview: Classification of Elements and Periodicity in Properties. These are the concepts Punjab Board 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 — Punjab Board 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 5 chapters — Punjab Board Class 11 Chemistry Syllabus

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 Punjab Board Class 11 Chemistry.

Try Super Tutor Free
Try the full chapter — Free