​Two nonmetals

​Electron(s) are

​shared

​Between a metal and nonmetal

​Electrons are transferred from a metal to a nonmetal

Ionic Bonds

• Form Crystalline Lattice (crystals)

• Have high melting and boiling points

• Hard

• Brittle

• Conduct electricity when dissolved in water

What you need to remember...

• Metals + Nonmetals

• Make IONIC bonds

• Transfer electrons

• High electronegativity difference

Covalent Compounds

• Have Lower melting and boiling points

• Tend to be flammable

• When dissolved in water they do not conduct electricity

• Soft or brittle solid

• Can also form crystals

What you need to remember

• Nonmetal + Nonmetal

• Make COVALENT bonds

• Share electrons

• Low electronegativity difference

ELECTRONEGATIVITY

• DEN Range is the difference in electronegativity values between atoms

• Determines the type of bond

• Covalent bonds have similar electronegativities

• Ionic bonds have different electronegativities

Metallic Bonds

• good conductors of heat and electricity

• malleable and ductile

• lustrous

• opaque

What you need to remember

• Metal ions near each other share valence electrons

• These valence electrons flow freely between all of the ions

• These delocalized electrons are why metals conduct heat and electricity

• It is also why metals are malleable and ductile