Ionic Bond

1
Ionic Bond

• e- are transferred
• 1 metal and 1 nonmetal
• Large difference
• in electronegativity(gt1.7)

2
Properties of Ionic Bonds

• composed of cations () and anions (-)
• simplest form is the formula unit
• high melting points
• high boiling points
• solids at room temp. (brittle)
• conducts in solution or in molten state
• soluble in H2O

3
Covalent Bond

• e- are shared
• 2 nonmetals
• Small difference
• in electronegativity (lt1.7)

4
Properties of Covalent Bonds

• two elements share electrons between them
• simplest form is the molecule
• low melting points
• low boiling points
• some are gases at room temp.
• nonconductors

5
Metallic Bond

• Composed of metal cations
• Sea of electrons model
• Very compact, ordered structure

6
Properties of Metallic Bonds

• Good conductors
• Have luster (shine)
• High melting point
• High boiling point
• Ductile
• Malleable
• Solids at room temperature
• Can form alloys (stainless steel, sterling silver)