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ATOMIC THEORY, PERIODIC CLASSIFICATION AND PROPERTIES OF ELEMENT

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Presentation on theme: "ATOMIC THEORY, PERIODIC CLASSIFICATION AND PROPERTIES OF ELEMENT"— Presentation transcript:

1 ATOMIC THEORY, PERIODIC CLASSIFICATION AND PROPERTIES OF ELEMENT

2 ATOMIC THEORIES AND MODELS

3 Dalton’s Atomic Theory

4 Atomic model of Thomson

5 Rutherford’s model

6 Bohr’s model

7

8 Quantum Mechanical model

9 History – classification of Elements
Dobereiner- 1829 John Alexander Newland- 1865 Dmitri Mendeleef & Lother Mayer Henry Mosley-1913

10 Dobereiner triads

11 Octaves of Newland

12 Mendeleef’s periodic table

13 Modern periodic table

14

15 Periodic Properties Atomic radius Ionic radius Ionisation Enthalpy
Electron Gain Enthalpy Electronegativity Valency Atomic size Covalent radius Vander Waal radius Metallic and non-metallic properties

16

17 Atomic radius

18 Ionic radius Anion Cation

19 Ionisation Enthalpy

20 Electron gain Enthalpy

21 electronegativity

22 Valency

23 Atomic size

24 Periodic Properties

25 Covalent, Vander Waal & metallic radius

26 Metallic & Non metallic properties
Decreasing metallic character

27

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