Periodic%20Table:

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• Periodic Table
• Alkali Metals

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Alkali Metals

• Metals
• Lithium
• Sodium
• Potassium
• Rubidium
• Cesium
• Francium

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Rubidium

• Similar physical and chemical characteristics to
  potassium.
• 17th most abundant element
• Melting Point so low you can melt it in your
  hands if you have a fever
• Once thought to be rare but recent discoveries
  found large deposits of Rubidium

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Lithium

• Lightest of all metals.
• Less dense than water
• First metal in group
• Pure form it is soft, silvery and shiny.
• Low melting point.

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Sodium

• Reacts violently and rapidly with air.
• Its pure form its silvery white and soft enough
  to be cut with a knife.
• Boiling Point about Water's Boiling point
• (97 degrees Celsius)

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Potassium

• Reacts violently with water
• Will burst into flames when in contact with water
  
• In pure form it is silvery white metal, and is a
  soft object
• Is the seventh most abundant element
• Also less dense than water.

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Cesium

• A bright silvery metal
• Is a liquid in a warm room
• So reactive it will explode if made contact with
  ice.
• Is used in atomic clock

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Francium

• The last known alkaline metal
• Does not occur to any insignificant extent in
  nature
• All isotopes are radioactive and have short half
  lives. 22 Minutes were the longest
• The existence of Francium was predicted by Dmitri
  Mendeleev.
• The Discovery is credited to Marguerite Perey who
  was an assistant.

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