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Chapter 23

Chapter 23 - Metals and Metallurgy

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Department
Chemistry
Course
CHMA10H3
Professor
Shadi Dalili
Semester
Winter

Description
Chapter 23 Metals and Metallurgy 23.2 The General Properties and Natural Distribution of Metals - All metals are opaque, good conductors of heat and electricity, malleable (flexible) and ductile (make into wires), in electron sea model, each atom releases valence electron (electrons occupy energy band called valence band that is delocalized over the entire solid) - Metals make up 25% of Earths crust, Al is MOST abundant, Alkali and Alkali Earth Metals make 1%, Fe only transition metal > 5%, Ni, Cu, Ag, Au, Pd and Pt found in native forms (NOBLE METALS) - Most metals are found in MINERALS (natural, homogeneous crystalline inorganic solids) 23.4 Metal Structures and Alloys - Alloys: Metals that have >1 type of metal (base metal and alloying materials), show metallic properties (show physical properties but engineering properties are different) - Alloy Composition: Some alloys are solid solutions with vari able composition
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