Skip to content

Public LibraryKnowledge for All

Home
Learn
Notes
Guidebooks
MCQs
Progress
History
Practice Tests
Guess Papers
Account

Loading learn tools

Loading topics

Loading home…

Everything you need to learn, understand and practice.

Free educational resources for every curious student.

Questions?Contact our team →

Keep learning

Browse TopicsExplore your subjects
Study ToolsMake learning easier

Explore

Browse Categories
Explore Topics
Learn Tools
Ask Anything

Help & Account

About Us
Contact Us
Sign In
Create Account

© 2026 Public Library. All rights reserved to their respective owners.

Loading Notes…

Loading Notes…

→

Choose what you want to open next.

Chapter 4: Periodic Table and Periodicity of Properties

FBISE / NBF · Class 9 Chemistry
20 topics in this chapter

4.1 Periodic TableThe periodic table is a systematic arrangement of elements in order of increasing atomic numberExplanation, equations & revision insideView Full Notes →
4.1.1 Periods and Groups of Elements### Periods The horizontal rows of the periodic table are called periodsExplanation, equations & revision insideView Full Notes →
4.1.2 s and p Blocks in the Periodic Table### s-Block Elements Group 1 and Group 2 elements contain their valence electrons in the s sub-shellExplanation, equations & revision insideView Full Notes →
4.2 Group Number and Charge on an IonThe group number of an element in the periodic table can provide information about the charge of an ionExplanation, equations & revision insideView Full Notes →
4.3 Periodicity of PropertiesPeriodicity of properties means that the physical and chemical properties of elements vary in a periodic mannerExplanation, equations & revision insideView Full Notes →
4.3.1 Shielding EffectShielding effect is the reduction in force of attractionExplanation, equations & revision insideView Full Notes →
4.3.2 Atomic SizeAtomic size is the average distance between the atomic nucleus and the electronic outer shellExplanation, equations & revision insideView Full Notes →
4.3.3 Ionization EnergyIonization energy is defined as the…Explanation, equations & revision insideView Full Notes →
4.3.5 ElectronegativityElectronegativity is the ability of an atom to attract electrons toward itself in a chemical bondExplanation, equations & revision insideView Full Notes →
4.4.1 Metallic CharacterMetallic character refers to a property of elements in the periodic table that determinesExplanation, equations & revision insideView Full Notes →
4.4.2 ReactivityThe capability of an element to react with other elements to form new compounds is called its reactivityExplanation, equations & revision insideView Full Notes →
4.4.3 DensityDensity is the mass per unit volumeExplanation, equations & revision insideView Full Notes →
4.4.4 Characteristic Properties of Alkali MetalsAlkali metals are the elements in Group 1 (IA)Explanation, equations & revision insideView Full Notes →
4.4.5 Prediction of Properties of Other Elements in Group 1Prediction of properties means using the periodic trends observed in a group to estimate the propertiesExplanation, equations & revision insideView Full Notes →
4.4.6 Position of Unknown Element in the Periodic TableYou can place an unknown element accurately at the appropriate position in the periodic table, and can predict its propertiesExplanation, equations & revision insideView Full Notes →
4.5 Transition ElementsTransition elements are elements located in the d-block (Group 3 to 12Explanation, equations & revision insideView Full Notes →
4.6 Lanthanides & Actinides### Lanthanides Lanthanides, also known as "rare earth elements", are a series of 14 elementsExplanation, equations & revision insideView Full Notes →
4.7 HalogensThe elements in Group 17 (or Group VII-A) are called halogensExplanation, equations & revision insideView Full Notes →
4.8 Noble GasesNoble gases, also known as inert gases, are a group of chemical elements found in Group 18 (or Group VIII-A)Explanation, equations & revision insideView Full Notes →
4.9 Comparison of General Physical Properties of Metals and Non-MetalsMetals are elements that tend to lose electronsExplanation, equations & revision insideView Full Notes →

← PreviousChapter 3: Atomic Structure

View all chapters

Chapter 5: Chemical BondingNext →

Discover more

Next chapterCh 5: Chemical BondingAll chaptersClass 9 ChemistryClass 9 notesMore subjectsChapter 1Nature of Science in ChemistryChapter 2MatterChapter 3Atomic StructureChapter 5Chemical BondingChapter 6StoichiometryChapter 7Electrochemistry

More Class 9 notes

Physics revision desk with formulas

Physics Grade 9 — Handwritten Notes

9 chapters • 131 topics

Chapter notes in handwritten style for the FBISE/NBF Class 9 Physics course.

Biology handwritten notes and microscope

Biology Grade 9 — Handwritten Notes

10 chapters • 55 topics

Chapter notes for the FBISE/NBF Class 9 Biology course, imported from the supplied notes pack.

Mathematics flashcards and solids

Mathematics Grade 9 — Handwritten Notes

11 chapters • 132 topics

Chapter notes in handwritten style for the FBISE/NBF Class 9 Mathematics course.

Computer science keyboard and algorithm notebook

Computer Science Grade 9 — Handwritten Notes

7 chapters • 112 topics

Chapter notes in handwritten style for the FBISE/NBF Class 9 Computer Science course.