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OXYGEN O 2

OXYGEN O 2. HISTORY. NAME: Oxus (acid) and gennan (generate) Joseph Priestley DISCOVERY: 1974 Carl Wilhelm Scheele Joseph Priestley. advancement – rozvoj, vzestup, pokrok combustion - hoření, vznícení, spalování. OCCURRENCE. Most abundant element in the universe

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OXYGEN O 2

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  1. OXYGEN O2

  2. HISTORY • NAME: Oxus (acid) and gennan (generate) Joseph Priestley • DISCOVERY: 1974 Carl Wilhelm Scheele Joseph Priestley advancement – rozvoj, vzestup, pokrok combustion - hoření, vznícení, spalování

  3. OCCURRENCE • Most abundant element in the universe 21% of the atmosphere 49% of earth's crust hydrosphere biosphere = significantbiogenous element source – zdroj abundant – hojný, oplývající, bohatý earth's crust - zemská kůra

  4. FORMS • O2 • Very reactive, colorless, odorless and tasteless gas • Exotermic reaction • Oxidation States: -2

  5. FORMS • O3 • highly reactive, bluish, poisonous gas • Swallows up UV radiation • Ozon layer

  6. groun ozon electrical discharge – elektrický výboj harmful – škodlivý detrimental – škodlivý, zhoubný bluish – modravý

  7. USES • O2 • O3 • Respiration • Welding and cutting of metal • Rocket fuel • dezinfection rely – spoléhat frequently – často available – přístupný, dosažitelný welding – svařování

  8. References: • http://periodic.lanl.gov/elements/8.html • http://education.jlab.org/itselemental/ele008.html • http://www.webelements.com/webelements/elements/text/O/key.html • http://www.sci.muni.cz/~dobro/ozon_1.html

  9. Thank you for your attention ! Presentation was prepared by: Andrea Urbanová Lucie Vašíčková 27. 10. 2005 Brno University of Technology

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