The Element Iodine

1
The Element Iodine

• The History and Everyday Uses.
• By S.P. 10/27/2009

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General Information on Iodine

• The atomic number for Iodine is 53
• The atomic mass of Iodine is 126.90447
• The melting point of Iodine 236.60 F
• The boiling point of Iodine is 363.20F
• Iodine has 74 neutrons and 53 protons and
  electrons.
• http//www.shef.ac.uk/chem/web-elements/index.htm
  l

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Some More Info on Iodine

• Iodine is classified as a solid.
• Iodine is in the Halogen
• Iodine symbol is I
• Iodines crystal structure is Orthorhombic
• Iodines density is 4.94
• Iodines CAS number is 7553-56-2
• ChemFinder.Com Search Form

4
More Info on Iodine

• Iodines valence number is -1, 1, 5 and 7
• Iodines cost per bulk is /100g
• The cost of Iodine pure is 8.3 /100g
• Because of Iodines reactivity, Iodine dose not
  exist in the free elemental state in nature, but
  small quantities are combined in many sliver ores
  found in Mexico.
• http//library.thinkquest.org/2690/cgi-bin/LookupE
  lement.cgi?53

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The Discovery of Iodine

• Iodine was discovered in 1811 by Bernard
  Courtois.
• He treated the liquor obtained from the
  extraction of seaweed which is now known to
  contain iodide salts, with sulphuric acid to
  produce a vapor with a violet color
• http//www.vcs.ethz.ch/chemglobe/ptoe/_/53.html

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Atomic Structure

• Iodine had 5 energy levels.
• First Energy Level 2 Second Energy Level 8
  Third Energy Level 18 Fourth Energy Level 18
  Fifth Energy Level 7

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Electron configuration

• The ground state electron configuration is
  Kr.4d10.5s2.5p5
• The shell structure is 2.8.18.18.7
• The electron configuration for Iodine is 1s2,
  2s2, 2p6, 3s2, 3p6, 3d10, 4s2, 4p6, 4d10, 5s2, 5p5

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Isotopes

• l-122-The half life is 3.6 minutes
• l-123-13.2 hours
• l-124- 4.2 days
• l-125- 60.1 days
• l-126- 13.0 days
• l-127- stable
• l- 128- 25.0 minutes
• l- 129- 1.57E7 years

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Isotopes

• l- 130- 12.4 hours
• l- 131- 8.0 days
• l- 132- 2.3 hours
• l- 133- 20.8 hours
• l- 134- 52.6 minutes
• l- 135- 6.6 hours
• l- 136- 1.4 minutes

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Appearance and Characteristics

• Iodine is blackish
• When its heated it gives off a violet smoke
• Iodine structure is layers of 12
• Iodine is toxic
• http//www-tech.mit.edu/Chemicool/

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Chemical Reactivity

• Iodine resembles chlorine and bromine in its
  reactivity, but its a lot less reactive.
• Iodine combines directley with many elements but
  it might be necessary to use heat or a catalyst.
• http//www.chemicalelements.com/

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Everyday Uses

• Iodine is used in medicine where its solution in
  alcohol, called tincture of iodine, is used as
  a disinfectant.
• Iodine is used in the manufacture of compounds
  used in photography ( sliver iodide which is a
  light sensitive material used in film.
• Iodine is used in the manufacture of dyestuffs
  and drugs and as a regent in analytical
  chemistry.