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CHEMICAL BONDING

CHEMICAL BONDING. R.SANGEETHA. INTRODUCTION. ATOMS COMBINE TO FORM COMPOUNDS SO AS TO ATTAIN STABLE NEAREST RARE GAS CONFIGURATION. MOST COMMON TYPES OF BONDING ARE IONIC BONDING COVALENT BONDING DATIVE BONDING METALLIC BONDING. IONIC BONDING.

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CHEMICAL BONDING

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  1. CHEMICAL BONDING R.SANGEETHA

  2. INTRODUCTION • ATOMS COMBINE TO FORM COMPOUNDS SO AS TO ATTAIN STABLE NEAREST RARE GAS CONFIGURATION. • MOST COMMON TYPES OF BONDING ARE • IONIC BONDING • COVALENT BONDING • DATIVE BONDING • METALLIC BONDING

  3. IONIC BONDING • WHEN BONDING TAKES PLACE BY COMPLETE TRANSFER OF ONE OR MORE ELECTRONS FROM VALENCE SHELL OF ONE ATOM TO VALENCE SHELL OF ANOTHER ATOM. • EXAMPLE:NaCl • Na:Atomic no:11 • Cl: Atomic no:17 • ONE ELECTRON FROM Na IS TRANSFERRED TO Cl TO FORM IONIC BOND.

  4. FORMATION OF NaCl Na atom Cl atom

  5. COVALENT BONDING • WHEN BONDING TAKES PLACE BY SHARING OF ELECTRONS FROM BOTH THE ATOMS TO FORM THE COMPOUND IT IS CALLED AS COVALENT BOND • EXAMPLE:Cl2

  6. FORMATION OF Cl2 Cl atom Cl atom

  7. IONIC MOSTLY EXIST AS SOLIDS DUE TO STRONG ELECTROSTATIC FORCE OF ATTRACTION High melting and boiling point COVALENT THEY EXIST IN ALL THREE FORMS(ie) Solid,liquid&gases LOW MELTING AND BOILING POINT DIFFERENCE BETWEEN IONIC&COVALENT COMPOUNDS

  8. DATIVE BONDING • The shared pair of electrons are given by one of the combining two atoms. • Example • NH3 BF3

  9. METALLIC BONDING • METALS ARE HELD TOGETHER BY STRONG FORCE WHICH IS CALLED AS METALLIC BOND.

  10. SUMMARY • BONDING GENERALLY TAKES PLACE TO FORM STABLE COMPOUNDS

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