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ICSE Class X Notes 2019 : Chemistry

40 pages, 78 questions, 1 questions with responses, 1 total responses,    2    0
Yash Kankariya
Ashoka Universal School (AUS), Nashik
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IMPORTANT POINTS FOR QUICK REVISION Chapter 1-Periodicity of elements Atomic Size: Atomic size is measured in terms of atomic radius. Atomic radius is the distance from the centre of nucleus to the outermost shell to which electron belong. Ionisation Potential/Ionisation Energy/Ionisation Enthalpy: It is the minimum amount of energy required to remove most loosely bound electron from the valence shell of an isolated gaseous atom. Electron Affinity: It is amount of energy released when an extra electron is added to the outermost shell of an isolated gaseous atom to form an anion. Electronegativity: It the ability or capacity of an atom to attract shared pair of electrons towards itself in a covalently bonded molecule is called as electronegativity. Trend of Properties Across period and Down the Group Property Down the Group Across Period Atomic Size Increases Decreases Ionisation Potential Decreases Increases Electron Affinity Decreases Increases Electronegativity Decreases Increases Metallic Character Increases Decreases Decreases Increases Non-metallic Character Important Points For Quick Revision -Ketan.R.Thakkar 1

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