Electron Sharing can be EQUAL or UNEQUAL

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Presentation transcript:

Electron Sharing can be EQUAL or UNEQUAL Covalent Bonding Electron Sharing can be EQUAL or UNEQUAL

Polar Covalent Bonds UNEQUAL sharing of electrons EN value 0.5 – 1.5 Ex: C and O C = 2.5; O = 3.5 difference = 1.0

Non-Polar Covalent Bonds EQUAL sharing of electrons EN value 0 – 0.5 Ex: C and H C = 2.5; H = 2.1 difference = 0.4

VSEPR Symmetry (Valence-shell electron pair repulsion) Tells the shape of the molecule

Linear 1 bond Examples: F2 F – F HCl H – Cl CO2 O = C = O

Linear 1 bond

Bent 2 bonds H O Examples: H2O SO2 H S O

Bent 2 bonds

Trigonal Planar 3 bonds H Examples: NH3 CH2O N H O C H

Trigonal Planar 3 bonds

Tetrahedral 4 bonds H Examples: CH4 CCl4 H C H H Cl Cl C Cl Cl

Tetrahedral 4 bonds