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Francium

 By Ciera Johnson
Basic Information
• Atomic Symbol: Fr

• Atomic Number: 87

• Protons: 87

• Electrons: 87

• Neutrons: 136

• Average Atomic Mass: 223
Continued
                            • Group in periodic table: 1

                            • Group name: Alkali metal

                            • Period in periodic table: 7

                            • Melting point: 27.2ºC (80.96ºF)

                            • Boiling point: 677ºC (1,250.6ºF)

• It is so radioactive and hard to work with, there is not
  much known about Francium.

• It also has no uses because it is so radioactive.
Interesting Information
• The second rarest naturally occurring
  element.
• It was the last element discovered in nature,
  that isn’t synthesis.
• The most unstable of the naturally occurring
  elements
• As little as 20–30 g (one ounce) exists at any
  given time throughout the Earth’s crust.
Discovery
   • Francium (Eka-caesium)
     was discovered in 1939 by
     Marguerite Perey of the
     Curie Institute in Paris,
     France
   • This element existence was
     predicted by Mendeleev
     during the 1870's, he called
     it eka-caesium.
Isotopes

• There are 34 identified Francium isotopes.
• There are no stable isotopes of Francium.
• Francium-223 is the most stable isotope with a
  half-life of 21.8 minutes
• The least stable ground state isotope is
  francium-215, with a half-life of 0.12 "s.
• All isotopes of Francium decay into either
  astatine, radium, or radon.
Atomic Structure.

        • 7 Energy Levels

        • 1st: 2
                       • 4th: 32
        • 2nd: 8
                       • 5th: 18
        • 3rd: 18
                       • 6th: 8

                       • 7th: 1
Courses Cited
• http://en.wikipedia.org/w/index.php?
  title=Francium&printable=yes
• http://www.andyscouse.com/pages/francium.htm
• http://www.chemicalelements.com/elements/
  fr.html
• http://www.aip.org/history/newsletter/fall2004/
  strasbourg-photo.htm
• http://www.webqc.org/periodictable-Francium-
  Fr.html
• http://www.periodicvideos.com/videos/087.htm

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Francium

  • 2. Basic Information • Atomic Symbol: Fr • Atomic Number: 87 • Protons: 87 • Electrons: 87 • Neutrons: 136 • Average Atomic Mass: 223
  • 3. Continued • Group in periodic table: 1 • Group name: Alkali metal • Period in periodic table: 7 • Melting point: 27.2ºC (80.96ºF) • Boiling point: 677ºC (1,250.6ºF) • It is so radioactive and hard to work with, there is not much known about Francium. • It also has no uses because it is so radioactive.
  • 4. Interesting Information • The second rarest naturally occurring element. • It was the last element discovered in nature, that isn’t synthesis. • The most unstable of the naturally occurring elements • As little as 20–30 g (one ounce) exists at any given time throughout the Earth’s crust.
  • 5. Discovery • Francium (Eka-caesium) was discovered in 1939 by Marguerite Perey of the Curie Institute in Paris, France • This element existence was predicted by Mendeleev during the 1870's, he called it eka-caesium.
  • 6. Isotopes • There are 34 identified Francium isotopes. • There are no stable isotopes of Francium. • Francium-223 is the most stable isotope with a half-life of 21.8 minutes • The least stable ground state isotope is francium-215, with a half-life of 0.12 "s. • All isotopes of Francium decay into either astatine, radium, or radon.
  • 7. Atomic Structure. • 7 Energy Levels • 1st: 2 • 4th: 32 • 2nd: 8 • 5th: 18 • 3rd: 18 • 6th: 8 • 7th: 1
  • 8. Courses Cited • http://en.wikipedia.org/w/index.php? title=Francium&printable=yes • http://www.andyscouse.com/pages/francium.htm • http://www.chemicalelements.com/elements/ fr.html • http://www.aip.org/history/newsletter/fall2004/ strasbourg-photo.htm • http://www.webqc.org/periodictable-Francium- Fr.html • http://www.periodicvideos.com/videos/087.htm

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