Classification of Elements and Periodicity in Properties
ICSE · Class 11 · Chemistry
Summary of Classification of Elements and Periodicity in Properties for ICSE Class 11 Chemistry. Key concepts, important points, and chapter overview.
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Chemistry becomes systematic when elements are arranged according to a law that connects their properties. The periodic table organizes about 118 known elements so that elements with similar outer electronic configurations fall into the same group and show similar chemical behaviour. The modern form
Key Concepts
Elements form many compounds
Elements form many compounds, so a systematic arrangement is needed to make their study simpler. A good classification groups elements with similar pr
Prout proposed the unitary theory
Prout proposed the unitary theory. Döbereiner arranged elements in triads. Cooke grouped elements into homologous series. Newlands gave the law of oct
The physical and chemical properties
The physical and chemical properties of the elements and their compounds are periodic functions of their atomic weights. Mendeleev arranged known elem
The physical and chemical properties
The physical and chemical properties of the elements are periodic functions of their atomic numbers. Moseley showed that atomic number is the most fun
The long form periodic table has
The long form periodic table has seven periods and eighteen groups. It is arranged by increasing atomic number and is closely linked with electronic c
Learning Objectives
- Understand why classification of elements was needed
- Recall the major early attempts at classification
- State Mendeleev's Periodic Law and Modern Periodic Law
- Describe the structure of Mendeleev's table and the long form periodic table
- Identify s-block, p-block, d-block, and f-block elements
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