Metallic Bonds

Review of Chemical Bonds Ionic= Metal + Nonmetal Covalent= Nonmetal + Nonmetal or Semimetal + Nonmetal

Covalent Bonds

METALLIC BOND bond found in metals; holds metal atoms together very strongly

Characteristics of Metals Shiny Ductile Malleable Good conductors of heat Good conductors of electricity

Positive ions in a sea of electrons- electrons move around freely

Metals are shiny Electrons absorb photons of light and jump to a higher energy level. When they return to the lower energy level, energy is released as light

Metals conduct electricity Electrons move into the sea of electrons Metals conduct electricity Electrons move into the sea of electrons. An equal number of electrons enter the metal as the number that exits the metal.

Metals conduct heat Electrons in the “electron sea” move more quickly when they are heated.

Metals are malleable The mobile sea of electrons allow them to deform Metals are malleable The mobile sea of electrons allow them to deform. The cations are shielded from each other, preventing the metal from shattering

Metals are malleable Ionic compounds are not malleable Metals are malleable Ionic compounds are not malleable. The force would push like charges close together causing a strong repulsion and they will shatter

Metals are ductile Metals are ductile for the same reason that they are malleable. Their conductivity and malleability make them ideal for making electrical wires.

Metals form crystalline solids **Except Mercury!!