TRANSITION ELEMENTS Section 3 · Transition elements provide the materials for many things...
Transcript of TRANSITION ELEMENTS Section 3 · Transition elements provide the materials for many things...
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TRANSITION ELEMENTS
Section 3
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What we’ll learn?
• Identify properties of some transition elements.• Distinguish lanthanides from actinides.
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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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Vocabulary:
• Catalyst• Lanthanide• Actinide• Synthetic element
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• Groups 3-12• Metals• Combined with their elements in Ores (rocks that
contain minerals such as gemstone or metals)
Transition Elements
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IRON TRIAD
• 3 elements : -iron (Fe), Cobalt (Co), Nickel (Ni)-similar properties
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USES:
• Magnetic Properties- Industrial magnets from cobalt & nickel
• Nickel + Cadmium = batteries• Iron (Fe) – part of HEMOGLOBIN (substance
that transport oxygen in the blood)
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• Iron (Fe)- mixed with other metals & carbon to create steels (bridges, skyscrapers, buildings)
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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
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• Chromium ( Ch)- “chroma” (color)- Brilliant colors
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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
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INNER TRANSITION ELEMENTSa. Lanthanide ( Cerium-Lutetium)
b. Actinide ( Thorium- Lawrencium)
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Lanthanide:
• Rare elements• Found with O2• Soft metals• Hard to separateUses:Cerium –Misch metal (lighter)
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Actinide
• Radioactive-Uranium (U) found in earth’s crust
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Synthetic Elements (man- made)
• Plutonium( Pu)– as fuel in nuclear power plants.• Americium (Am)- smoke detectors• Californium 252 (Cf)- kill cancer cells
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Dental Materials:
• Amalgam- fill in cavities (silver filling)(mixture of Copper (Cu), Tin (Sn), mercury (Hg)• Braces (wire)- nickel (Ni), titanium (Ti) alloy