Jimmy Blum Heather Collins Ciara Smith
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Transcript of Jimmy Blum Heather Collins Ciara Smith
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Jimmy Blum Heather Collins
Ciara Smith
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Appearances
All of the group 1 elements are silvery- colored metals.
They are soft and can be easily cut with a knife to expose a shiny surface which dulls on
oxidation.
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Uses
Alkali metals are used for all sorts of things. Some are used in food, medications. Some are necessary for your body to function, like
potassium.
http://amyschaefer24.wikispaces.com/Periodic+Table+Group+Project
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Chemical Properties and Reactions
• Elements exhibit well-characterized homologous behavior
• Going down the periodic table, all of the elements show decreasing electronegativity, increasing reactivity, decreasing melting and boiling points,
and increasing densities with the exception to potassium and sodium
• The reaction with oxygen tarnishes the metals in air so they are stored under oil considering water makes them react
• They react vigorously with water to produce hydroxides and release hydrogen
• They react aggressively with the halogens to form ionic salts
• The heavier alkali metals react more violently than lighter ones
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History of the Alkali Metals• Lithium• Discovered in 1817 in Sweden by Johan August Arfvedson
• Sodium• Discovered in 1807 in Britain by Sir Humphry Davy
• Potassium• Discovered in 1807 in Britain by Sir Humphry Davy
• Rubidium• Discovered in 1861 in Germany by Robert Bunsen and Gustav Kirchoff
• Caesium• Discovered in 1869 in Germany by Robert Bunsen and Gustav Kirchoff
• Francium• Discovered in 1939 in France by Marguerite Perey