Basic Concepts of Chemical Bonding
Cover 8.1 to 8.7 EXCEPT
1. Omit Energetics of Ionic Bond Formation
Omit Born-Haber Cycle
2. Omit Dipole Moments
, ELEMENTS & COMPOUNDS
• Why do elements react to form compounds ?
• What are the forces that hold atoms together
in molecules ?
and ions in ionic compounds ?
,Electron configuration predict reactivity
Element Electron configurations
Mg (12e) 1S2 2S2 2P6 3S2 Reactive
Mg2+(10e) [Ne] Stable
Cl(17e) 1S2 2S2 2P6 3S2 3P5 Reactive
Cl- (18e) [Ar] Stable
, CHEMICAL BONDS
attractive force holding atoms together
Single Bond: involves an electron pair
e.g. H2
Double Bond: involves two electron pairs
e.g. O2
Triple Bond : involves three electron pairs
e.g. N2
Cover 8.1 to 8.7 EXCEPT
1. Omit Energetics of Ionic Bond Formation
Omit Born-Haber Cycle
2. Omit Dipole Moments
, ELEMENTS & COMPOUNDS
• Why do elements react to form compounds ?
• What are the forces that hold atoms together
in molecules ?
and ions in ionic compounds ?
,Electron configuration predict reactivity
Element Electron configurations
Mg (12e) 1S2 2S2 2P6 3S2 Reactive
Mg2+(10e) [Ne] Stable
Cl(17e) 1S2 2S2 2P6 3S2 3P5 Reactive
Cl- (18e) [Ar] Stable
, CHEMICAL BONDS
attractive force holding atoms together
Single Bond: involves an electron pair
e.g. H2
Double Bond: involves two electron pairs
e.g. O2
Triple Bond : involves three electron pairs
e.g. N2
