1.1 What is Chemistry?

http://www.ck12.org Chapter 6. The Periodic Table

6.4 References

1. John Dalton. http://commons.wikimedia.org/wiki/File:Dalton%27s_Element_List.jpg. Public Domain


2. Dmitri Mendeleeev. http://commons.wikimedia.org/wiki/File:Mendelejevs_periodiska_system_1871.png.
   Public Domain


3. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


4. Christopher Auyeung and Joy Sheng. CK-12 Foundation. CC BY-NC 3.0


5. Courtesy of the US Department of Energy. http://www.etec.energy.gov/Operations/Sodium/Sodium_Index.ht
   ml. Public Domain


6. Hi-Res Images of Chemical Elements. Be: http://images-of-elements.com/beryllium.php; Mg: http://imag
   es-of-elements.com/magnesium.php; Ca: http://images-of-elements.com/calcium.php; Sr: http://images-of-el
   ements.com/strontium.php; Ba: http://images-of-elements.com/barium.php. CC BY 3.0


7. Courtesy of Hi-Res Images of Chemical Elements. Silver: http://images-of-elements.com/silver.php; Chromi
   um: http://images-of-elements.com/chromium.php. CC BY 3.0


8. Ben Mills (User:Benjah-bmm27/Wikimedia Commons). http://commons.wikimedia.org/wiki/File:Coloured-
   transition-metal-solutions.jpg. Public Domain


9. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


10. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


11. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


12. User:JJnoDog/De.Wikipedia. http://commons.wikimedia.org/wiki/File:IonizationEnergyAtomicWeight.PNG
    . Public Domain


13. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


14. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


15. Zachary Wilson. CK-12 Foundation. CC BY-NC 3.0


16. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0


17. Mercury: User:Bionerd/Wikimedia Commons; Gold: Eckhard Pecher; Copper: Scott Ehardt. Mercury: http://
    commons.wikimedia.org/wiki/File:Pouring_liquid_mercury_bionerd.jpg; Gold: http://commons.wikimedia.o
    rg/wiki/File:Kanazawa_Gold_Factory.jpg; Copper: http://commons.wikimedia.org/wiki/File:Stranded_lamp
    _wire.jpg. Mercury: CC BY 3.0; Gold: CC BY 2.5; Copper: Public Domain


18. Sulfur: Ben Mills (User:Benjah-bmm27/Wikimedia Commons); Bromine: Hi-Res Images of Chemical Ele-
    ments; Helium: Derek Jensen (User:Tysto/Wikimedia Commons). Sulfur: http://commons.wikimedia.org/wik
    i/File:Sulfur-sample.jpg; Bromine: http://images-of-elements.com/bromine.php; Helium: http://commons.wik
    imedia.org/wiki/File:Goodyear-blimp.jpg. Sulfur: Public Domain; Bromine: CC BY 3.0; Helium: Public
    Domain


19. User:Jurii/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:Silicon.jpg. CC BY 3.0


20. User:Mirek2/Wikimedia Commons. http://commons.wikimedia.org/wiki/File:Periodic_trends.svg. Public
    Domain