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Index: Classification of Elements & Periodicity in Properties | Chemistry Class 11 - NEET PDF Download

Introduction 

This index provides a structured overview of NCERT topics on the classification of elements and periodic trends. It includes key concepts such as the genesis of the periodic table, modern periodic law, nomenclature of elements, electronic configurations, and periodic properties. The index also features relevant videos, documents, practice tests, and past year questions to support effective learning and revision.

The following documents provide in-depth coverage of each topic, with explanations, practice questions, and additional resources to aid in mastering the concepts.

(a) Genesis of Periodic Classification

(b) Modern Periodic Law and the Present form of the Periodic Law

(c) Nomenclature of Elements with Atomic Numbers > 100

(d) Electronic Configurations of Elements and the Periodic Table

(e) Electronic Configurations and Types of Elements: s, p, d, f Blocks

(f) Periodic Trends in Properties of Elements

(g) Past Year Questions

(h) NCERT Textbook and Solution

(i) Tests, Question Doc and Summary

The document Index: Classification of Elements & Periodicity in Properties | Chemistry Class 11 - NEET is a part of the NEET Course Chemistry Class 11.
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FAQs on Index: Classification of Elements & Periodicity in Properties - Chemistry Class 11 - NEET

1. What are the main categories of elements in the periodic table?
Ans. The main categories of elements in the periodic table are metals, nonmetals, and metalloids. Metals are typically good conductors of heat and electricity, have high melting points, and are malleable and ductile. Nonmetals are generally poor conductors and have lower melting points, while metalloids possess properties intermediate between metals and nonmetals.
2. How does the periodic table organize elements based on their properties?
Ans. The periodic table organizes elements in order of increasing atomic number, which corresponds to the number of protons in an atom's nucleus. Elements in the same group (vertical columns) tend to have similar chemical properties due to their valence electron configurations, while elements in the same period (horizontal rows) show a gradual change in properties.
3. What is periodicity in properties of elements?
Ans. Periodicity in properties refers to the recurring trends that are observed in the properties of elements as you move across or down the periodic table. These trends include atomic radius, ionization energy, electronegativity, and electron affinity, which change in a predictable manner due to the arrangement of electrons in atoms.
4. Why do elements in the same group have similar chemical properties?
Ans. Elements in the same group have similar chemical properties because they have the same number of valence electrons. This similarity in electronic configuration leads to comparable reactivity and bonding behavior, as these elements tend to lose, gain, or share electrons in similar ways during chemical reactions.
5. What role do electron configurations play in the classification of elements?
Ans. Electron configurations play a crucial role in the classification of elements as they determine the arrangement of electrons in an atom, influencing its chemical behavior and properties. The periodic table is structured based on these configurations, with elements having similar configurations grouped together, which allows for the prediction of reactivity and interactions among elements.
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