DISCOVERY OF ASTATINE

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DISCOVERY OF ASTATINE

• By S.M.
• 11/14/2009

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General Information of Astatine

• The atomic number of astatine is 85.
• The atomic weight of astatine is 210.
• The symbol of astatine is AT.

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More Info of Astatine

• Astatine is classified in group 17.
• There are 125 nuetrons.
• There are 85 protons/electrons.
• It is classified as halogen.

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Discovery

• Astatine was discovered in 1940 by Dale Korson.
• It was discovered at the university of
  California.
• Astatine is greek for unstable.

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ISOTOPES

• Isotope Half Life At-20629.4 minutes At-2081.6
  hours At-2117.2 hours At-2150.1 milliseconds
  At-21732.0 milliseconds At-2181.6 seconds
  At-21950.0 seconds.
• There are 20 isotopes in all.

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MORE INFO

• The CAS number is 7440-68-8.
• The valence number is 1,3,5,7.
• A very small amount of Astatine is found on the
  earths crust. Also in the rock uranite.

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BOILING POINT

• The boiling point of Astatine is is 610 K .
• The melting point of Astatine is 572.2 K .

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CONDUCTIVITY

• thermal conductivity J/m-sec-deg .
• electrical conductivity1/mohm-cm .
• polarizability6 A3.

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STATE AT ROOM TEMP

• The state of Astatine at room temperature is
  solid.
• The electronegativity ( pauling) is 2.2.
• The atomic radius57.

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ENERGIES

• 1st ionization energy
• 890 kJ/mole
• electronegativity
• 2.2
• 2nd ionization energy
• kJ/mole
• electron affinity
• 270 kJ/mole
• 3rd ionization energy
• kJ/mole
• Specific heat
• ?
• heat atomization
• 92 kJ/mole atoms
•  
•  

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ELECTRON CONFIGURATION

• Ground state electron configuration 
  Xe.4f14.5d10.6s2.6p5
• Shell structure  2.8.18.32.18.7
• Term symbol   2P3/2

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OXIDATIONS

• Oxidation Electrons
• Shells
• 2,8,18,32,18,7
• electron configuration
• Xe 4f14 5d10 6s2 6p5
• minimum oxidation number
• -1
• maximum oxidation number
• 7
• min. common oxidation no.
• -1

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REACTIONS

• reaction with air
•  
• reaction with 6M HCl
•  
• reaction with 6M HCl
•  
• reaction with 15M HNO3
•  
• reaction with 6M NaOH

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ABUNDANCE

• source
• Synthetic(Th or U decay)
• rel. abund. solar system
• log
• abundance earth's crust
• log
• cost, pure
• /100g
• cost, bulk
• /100g

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RADIUS

• ionic radius (2- ion)
• pm
• ionic radius (1- ion)
• pm
• atomic radius
• pm
• ionic radius (1 ion)
• pm
• ionic radius (2 ion)
• pm
• ionic radius (3 ion)
• pm

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ELECTRON CONFIGURATION

• The electron configuration of Astatine is
• 1s2,2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10,
  4f14, 5s2, 5p6, 5d10, 6s2, 6p5

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WORKS CITED

• WWW.webelements.com
• www.chemiscool.com
• www.chemicalelements.com