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

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Presentation transcript:

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 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.

Na atom Cl atom FORMATION OF NaCl

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:Cl 2

Cl atom FORMATION OF Cl 2

DIFFERENCE BETWEEN IONIC&COVALENT COMPOUNDS 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

DATIVE BONDING The shared pair of electrons are given by one of the combining two atoms. Example NH 3 BF 3

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

SUMMARY BONDING GENERALLY TAKES PLACE TO FORM STABLE COMPOUNDS