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Periodic Properties and Variations of Properties - Physical and Chemical — Syllabus

ICSE · Class 10 · Chemistry

What Periodic Properties and Variations of Properties - Physical and Chemical covers in ICSE Class 10 Chemistry: 4 topics, for the 2026-27 session.

43 questions46 flashcards6 formulas & key relations5 concepts

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A comprehensive labeled diagram of the modern long-form periodic table, clearly showing the s, p, d, and f blocks, numbered periods (1-7), and numbered groups (1-18).
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4 Topics · ICSE Class 10 Chemistry · 2026-27

Topics in Periodic Properties and Variations of Properties - Physical and Chemical

1

1. Modern Periodic Table and Periodicity

  • The modern periodic table arranges elements in increasing order of atomic numbers.
  • The modern periodic table has seven periods and eighteen groups.
  • Elements with similar properties appear in the same group because their outer electronic configurations are similar.
2

2. Classification of Elements

  • Noble gases are Group 18 elements with completely filled shells: He, Ne, Ar, Kr, Xe and Rn.
  • Noble gases are practically unreactive under normal conditions because they have stable electronic configurations.
  • Representative elements include groups 1, 2, 13, 14, 15, 16, 17 and 18.
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3. Atomic Size or Atomic Radius

  • Atomic size or atomic radius is the distance from the centre of the nucleus to the outermost shell of electrons.
  • Atomic radius can be expressed in Angstrom unit or in picometres.
  • Å = 10^-8 cm = 10^-10 m.
4

4. Ionisation Energy and Ionisation Potential

  • Ionisation energy is the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom to form a cation.
  • Ionisation energy is expressed in kJ/mol or eV/atom.
  • Ionisation potential is the same quantity as ionisation energy but expressed in eV.

Key Concepts

Central concept: Periodic properties arise because elements show recurring patterns in electronic configuration when arranged by increasing atomic number

Modern periodic lawMendeleev's periodic lawPeriodicityClassification of elementsAtomic sizeIonisation energyElectron affinityElectronegativity

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Frequently Asked Questions

What are the important topics in Periodic Properties and Variations of Properties - Physical and Chemical for ICSE Class 10 Chemistry?
Key topics in Periodic Properties and Variations of Properties - Physical and Chemical include Modern Periodic Table and Periodicity, Classification of Elements, Atomic Size or Atomic Radius, Ionisation Energy and Ionisation Potential. Study these first, then practise questions on each for the ICSE Class 10 board exam.
How should I revise Periodic Properties and Variations of Properties - Physical and Chemical for the ICSE Class 10 board exam?
Learn the core ideas first, then work through the 43 practice questions on Periodic Properties and Variations of Properties - Physical and Chemical. Revise 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.

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