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TRANSITION ELEMENTS

Section 3. TRANSITION ELEMENTS. What we’ll learn?. Identify properties of some transition elements. Distinguish lanthanides from actinides. Why it’s important?. Transition elements provide the materials for many things including electricity in your home and steel for construction.

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TRANSITION ELEMENTS

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  1. Section 3 TRANSITION ELEMENTS

  2. What we’ll learn? • Identify properties of some transition elements. • Distinguish lanthanides from actinides.

  3. Why it’s important? Transition elements provide the materials for many things including electricity in your home and steel for construction.

  4. Vocabulary: • Catalyst • Lanthanide • Actinide • Synthetic element

  5. Transition Elements • Groups 3-12 • Metals • Combined with their elements in Ores (rocks that contain minerals such as gemstone or metals)

  6. IRON TRIAD • 3 elements : -iron (Fe), Cobalt (Co), Nickel (Ni) -similar properties

  7. USES: • Magnetic Properties- Industrial magnets from cobalt & nickel • Nickel + Cadmium = batteries • Iron (Fe) – part of HEMOGLOBIN (substance that transport oxygen in the blood)

  8. Iron (Fe)- mixed with other metals & carbon to create steels (bridges, skyscrapers, buildings)

  9. USES OF TRANSITION ELEMENTS • Tungsten (W)- -filaments in light bulb • highest melting point • Mercury (Hg) • Thermometers • Liquid @ room temp. • Lowest melting point • Poisonous to living things

  10. Chromium ( Ch) • “chroma” (color) • Brilliant colors

  11. Platinum Group (similar properties) Ruthenium( Ru), Rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), platinum( Pt) • don’t combine easily with other elements • Used as catalyst (a substance that can make something happen faster) • Used as plastics, medicines

  12. INNER TRANSITION ELEMENTS • Lanthanide ( Cerium-Lutetium) • Actinide ( Thorium- Lawrencium)

  13. Lanthanide: • Rare elements • Found with O2 • Soft metals • Hard to separate Uses: Cerium –Misch metal (lighter)

  14. Actinide • Radioactive -Uranium (U) found in earth’s crust

  15. Synthetic Elements (man- made) • Plutonium( Pu)– as fuel in nuclear power plants. • Americium (Am)- smoke detectors • Californium 252 (Cf)- kill cancer cells

  16. Dental Materials: • Amalgam- fill in cavities (silver filling) (mixture of Copper (Cu), Tin (Sn), mercury (Hg) • Braces (wire)- nickel (Ni), titanium (Ti) alloy

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