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METALS

METALS. PHYSICAL PROPERTIES OF METAL. Luster- how shiny an object is. Usually categorized as shiny or dull. Another physical property of metals. MALLEABILITY -the ability to be hammered, pressed or bent into shape w/out breaking. Yes, another physical property of metal.

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METALS

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  1. METALS

  2. PHYSICAL PROPERTIES OF METAL • Luster- how shiny an object is. Usually categorized as shiny or dull.

  3. Another physical property of metals • MALLEABILITY -the ability to be hammered, pressed or bent into shape w/out breaking.

  4. Yes, another physical property of metal. • DUCTILITY - the ability to be pulled or drawn out into a wire.

  5. More Physical Properties of Metal • Magnetism - the ability to attract or repel magnetic materials or become magnetic.

  6. color • Metals can be different colors. • This is another physical property.

  7. THE FINAL PHYSICAL PROPERTY OF METAL • CONDUCTIVITY - the ability to transfer heat or electricity.

  8. CHEMICAL PROPERTIES OF METAL • REACTIVITY- the ease & speed w/ which elements combine or react. • CORROSION- the destruction of a metal when iron is exposed to oxygen.

  9. Groups of METALS Alkali Metals Alkaline Earth Metals Transition Metals Mixed-Grouped Metals Lanthanides Actinides

  10. ALKALI METALS • Group 1 • VERY reactive • Shiny • Soft (you can cut with a knife) • Brainiac Alkali Metals Video

  11. ALKALINE EARTH METALS • Group 2 • Reactive (not as reactive as group 1) • Fairly hard • Gray-white • Good conductors of electricity

  12. TRANSITION METALS • Groups 3-12 • Hard • Shiny • Good conductors of electricity • Form colorful compounds

  13. MIXED GROUP METALS • Metals in groups 13-15 • Not very reactive

  14. LANTHANIDES • Soft • Malleable • Shiny • High conductivity • Used to make alloys

  15. ACTINIDES • Some are found naturally. • Others created artificially. • Unstable elements.

  16. REVIEW QUESTIONS • Give an example of how ductility can be useful? • What property of metals led to the use of plastic or wood handles on many metal cooking utensils? • What group contains the most reactive metals? • What area of the periodic table would you look to find a metal good for coating another metal to protect it from corrosion?

  17. ANSWERS • Copper’s ductility allows copper to be drawn into wires that carry electricity. • Metals are good conductors of heat. Plastic or wood handles, which do not conduct heat, protect hands from the heat. • Alkali metals, Group 1 • Groups 13-15

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