Chapter 20 The Transition Elements

1
Chapter 20 The Transition Elements

• Transition elements are those elements in Groups
  3-12 in the periodic table.

2
Transistion elements

• Transition Elements are the most familiar
  because they often occur in nature as uncombined
  elements unlike groups 1 and 2. Transition
  elements often from colored compounds.
• Cobalt Blue
• Cadmium Yellow
• From left to right, aqueous solutions of
  Co(NO3)2 (red) K2Cr2O7 (orange) K2CrO4
  (yellow) NiCl2 (green) CuSO4 (blue) KMnO4
  (purple).

3
Iron, Nickel, and Cobalt

• They form a unique cluster of transition
  elements. All three elements are used in the
  process to create steel and other metal mixtures.
• Iron the main component of steel is the mostly
  widely used of all metals.

4
Copper, Silver, Gold

• The three elements from Group 11 are so stable,
  Malleable, (what does this mean?) and are found
  as free elements in nature that they were used to
  make coins.
• They are sometimes referred as the coinage
  metals.
• Copper is used in wires
• Silver is used to make photographic film
• Gold is used for jewelry and NASA.

5
Zinc, Cadmium, Mercury

• They are found in Group 12.
• Zinc is ued to protect or coat objects such as
  metal.
• Why?
• Because Zinc does not rust.
• Cadmium is used also in coating metals, but is
  also used in rechargeable batteries.
• Mercury is a silvery, liquid metal only one
  at room temp. is used in thermometers,
  switches, and batteries.

6
The inner transition metals

• The two rows of elements that seem to be
  disconnected from the rest of the periodic table
  are called the inner transition elements, and
  they fit in the periodic table between groups 3
  4.

7
The Lanthanides

• These elements are called the lanthanide series
  because they follow the element lanthanum.
• These elements are used by the motion picture
  industry to make movies and to produce the colors
  you see on your TV.
• (Thank you Lanthanide series)

8
The Actinides

• These elements are called the actinide series
  because they follow the element actinium. All of
  the actinides are radioactive and are unstable.
  Uranium is an actinide found in the Earths crust
  in usable quantities.

9
Metals in the Crust

• Earths hardened outer layer, called the crust,
  contains many compounds and a few uncombinded
  metals such as gold and copper. Metals must be
  mined and separated from their ores.
• Most of the worlds platinum is found in South
  Africa.