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Due: Nothing Today: –Metallic Bonding –Reactivity of Metals (are all metals created equal?) HW Exit Ticket – Write a conclusion about the in class activity. Are all metals equal? Section 8.2 WS
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Metallic Bonding Strong forces of attraction are responsible for the high melting point of most metals.
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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 metal Valence electrons do not belong to any one atom
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Packing in Metals closest packing. Model: Packing uniform, hard spheres to best use available space. This is called closest packing. Each atom has 12 nearest neighbors.
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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
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The Reactivity of Metals Are all metals created equal? Let’s remember the periodic trends Ionization Energy Atomic Radius
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The Reactivity of Metals Reactivity – a measure of how readily and violently a substance will react with another substance
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The Reactivity of Metals Displacement – when a more reactive metal takes the place of another one in a compound
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The Reactivity of Metals Angelina is more reactive than Jennifer…. …so Angelina displaces Jennifer and wins Brad!
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The Reactivity of Metals What about a real chemical reaction…? …Magnesium and Copper Sulphate Magnesium + Copper Sulphate Copper + Magnesium Sulphate
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MetalSolutionChemical EquationDid a rxn occur? Which metal is more reactive? CuFeCl 3 CuAgNO 3 CuPb(NO 3 ) 2 ZnCu(NO 3 ) 2 ZnPb(NO 3 ) 2 ZnMg(NO 3 ) 2 MgZn(NO 3 ) 2 MgNa(NO 3 ) 2 MgKNO 3
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Grrrunt!!! P lease Potassium S top Sodium C alling Calcium M y Magnesium Z ebra Zinc I n Iron C lass, Copper S he Silver G runts! Gold To help us remember…
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Exit Ticket Why are all metals not equally reactive? (Hint: think about the periodic trends and location of the metals on the periodic table) Claim, Evidence, Reasoning
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