Dressen-Chemical Bonding Intro

Chemical BondingChapter 6 : 

Chemical BondingChapter 6

Some Definitions : 

Chemical bond: attractive force holding two or more atoms together. Covalent bond results from sharing electrons between the atoms. Usually found between nonmetals. Ionic bond results from the transfer of electrons from a metal to a nonmetal. Metallic bond: attractive force holding pure metals together. Some Definitions

Covalent Bonds : 

Covalent Bonds A covalent bond is typically formed by two non-metals.  Non-metals have similar electronegativities. Consequently, neither atom is "strong" enough to steal electrons from the other.  Therefore, the atoms must share the electrons.

Ionic Bonds : 

Ionic Bonds An ionic bond is typically formed between a metal and a non-metal.  Metals have low electronegativities (less than 2.0), while non-metals have high electronegativities (above 2.0). Consequently, the non-metal is "stronger" than the metal, and can steal electrons very easily from the metal.  This results in the metal becoming a cation, and the non-metal becoming an anion.

Ionic Compound Structure : 

Ionic Compound Structure

Ionic Radii vs Atomic Radii : 

Ionic Radii vs Atomic Radii

Covalent IonicCompounds Compounds : 

Covalent IonicCompounds Compounds Crystalline solids High melting and boiling points Conduct electricity when melted Many soluble in water but not in nonpolar liquid Gases, liquids, or solids Low melting and boiling points Poor electrical conductors Many soluble in nonpolar liquids but not in water

If the difference in electronegativity is between : 

1.7 to 4.0: Ionic 0.3 to 1.7: Polar Covalent 0.0 to 0.3: Non-Polar Covalent If the difference in electronegativity is between

Ionic Versus Covalent : 

Ionic Versus Covalent

Polar Covalent vs Non-Polar Covalent : 

Polar Covalent vs Non-Polar Covalent

Polar Covalent vs Non-Polar Covalent : 

Polar Covalent vs Non-Polar Covalent

Some Cool Chemistry Videos : 

Chemical Bonding by Cassiopeia Project Periodic Table by Cassiopeia Project Some Cool Chemistry Videos

Formation of a Covalent Bond : 

Formation of a Covalent Bond

Bond Energy vs. Length : 

Bond Energy vs. Length