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3-2: Metals

3-2: Metals. What is a metal?. Specific Physical Properties Hardness Shininess Malleability Can it be pounded into shapes? Ductility Can it be pulled into a long wire? Conductivity Magnetic (Fe, Co, Ni). Chemical Properties. Metals show a wide range of chemical properties

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3-2: Metals

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  1. 3-2: Metals

  2. What is a metal? • Specific Physical Properties • Hardness • Shininess • Malleability • Can it be pounded into shapes? • Ductility • Can it be pulled into a long wire? • Conductivity • Magnetic (Fe, Co, Ni)

  3. Chemical Properties • Metals show a wide range of chemical properties • Reactivity ranges from HIGH reactivity (explosively reactive) to UNREACTIVE (gold) • Corrosion • Ex. Iron reacting with oxygen to make rust

  4. Alloys • Alloys are mixtures of metals • Very useful • Bronze • Stainless Steel • Brass • You get the best properties of all the metals!

  5. Which Groups/Families are Metals? • Group 1: Alkali Metals • Group 2: Alkaline Earth Metals • Groups 3-12: Transition Metals • Al, Ga, In, Tl, Sn , Pb, Bi, Po • Lanthanides and Actinides

  6. Group 1: Alkali Metals • SUPER reactive • NEVER found alone in nature • (only as compounds) • When pure: • Soft and shiny • Sodium (Na) • Potassium (K) • 1 valence electron-loses it in reactions

  7. Group 2: Alkaline Earth Metals • Still pretty reactive • Hard, white or gray • Great conductors of electricity • Calcium (Ca) • Magnesium (Mg) • 2 valence electrons Lose them in reactions

  8. Groups 3-12: Transition Metals • Less reactive • Hard and shiny • Most Familiar • Gold (Au) • Silver (Ag) • Iron (Fe) • Copper (Cu) • Nickel (Ni) • Titanium (Ti)

  9. Metals in Other Groups(13-16) • Aluminum- Cans, airplanes • Tin-protect From corrosion • Lead-poisonous • Not nearly as reactive As metals on left side

  10. Lanthanides and Actinides • At the bottom of the Periodic Table •  YELLOW • Soft, malleable, shiny, great conductors • Uranium – nuclear power • All after uranium are man made and last fraction of second!

  11. What are 4 qualities of metals? Hard Shiny Malleable Ductile

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