Strong forces of attraction are responsible for the high melting point of most metals CA Standards Students know atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds ID: 486171
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Slide1
Metallic Bonding
Strong forces of attraction are responsible for the high melting point of most metals.Slide2
CA Standards
Students know
atoms combine to form molecules by sharing electrons to form covalent or metallic bonds or by exchanging electrons to form ionic bonds. Slide3
Metallic Bonding
The chemical bonding that results from the attraction between metal cations
and the surrounding sea of electrons
Vacant
p
and d orbitals in metal's outer energy levels overlap, and allow outer electrons to move freely throughout the metalValence electrons do not belong to any one atom Slide4
Packing in Metals
Model: Packing uniform, hard spheres to best use available space. This is called
closest packing.
Each atom has 12 nearest neighbors.Slide5
Metal Alloys
Substitutional
Alloy
: some metal atoms replaced by others of similar size.Slide6
Metal Alloys
Interstitial Alloy:
Interstices (holes) in closest packed metal structure are occupied by small atoms.Slide7
Properties of Metals
Metals are good conductors of heat and electricity
Metals are malleable
Metals are ductile
Metals have high tensile strength
Metals have luster