Metallic bonding:

Vacant p and d orbitals in metal's outer energy levels overlap, and allow outer electrons to roam freely. They are delocalized - move freely about the empty atomic orbitals

Model: Packing uniform, hard spheres to best use available space. This is called closest packing. Each atom has 12 nearest neighbors.

•Interstitial Alloy: Interstices (holes) Carbon in closest packed metal structure are occupied by small atoms.

Metals are good , conductors of heat and electricity

Metals are malleable

Metals are ductile

Metals have high tensile strength

Metals have high luster

Substitutional Alloy:

Properties of Substances with Metallic, lonic, and Covalent Bonds

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