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Transition Elements

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Transition Elements Chapter 5 Section 3 The Metals in the Middle Remember from Section 1 that the Transition elements are in groups 3-12 Transition elements don t ... – PowerPoint PPT presentation

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Title: Transition Elements


1
Transition Elements
  • Chapter 5 Section 3

2
The Metals in the Middle
  • Remember from Section 1 that the Transition
    elements are in groups 3-12
  • Transition elements dont change properties as
    much as Representative elements do

3
The Iron Triad
  • Most transition elements are already combined
    with other transition metalsores
  • The iron triad is made of three elements in
    period 4. Iron- Fe, Cobalt- Co, and Nickel- Ni

4
Uses
  • Transition Elements have a wide variety of uses
  • Tungsten- light bulbs
  • Mercury- Thermometers
  • Chromium- paint colors
  • Ruthenium, Rhodium, palladium, osmium, iridium
    and platinum- catalyst
  • Catalyst- substance that makes a reaction happen
    faster but doesnt change the reaction

5
Inner Transition Elements
  • WE have already sort of talked about the two
    series of inner elements---these are the funny
    ones on the bottom of the table
  • The Lanthanides
  • The Actinides

6
Lanthanide Series
  • Rare earthsbecause they were once thought to be
    scarce
  • Soft metals
  • Very hard to separate when they are in an ore
    togetherthey are so similar in properties

7
Actinide Series
  • Are ALL radioactive
  • Thorium, Protactinium and uranium are the only
    NATURALLY occurring elements on Earth
  • The rest are Synthetic elements
  • Synthetic--- made in laboratories and nuclear
    reactors

8
Dentistry
  • Dentists have been using amalgam to fill cavities
  • Amalgam is a mixture of silver, copper, tin and
    mercury
  • Since mercury is poisonous people have complained
    or stressed their concern
  • Dentist now use a combination of chemically
    resistant resins, porcelains and composites.

9
An after thought
  • What are the two Inner transition series called
    and what is a trait of each?
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