6.4. References http://www.ck12.org
6.4 References
1.. http://commons.wikimedia.org/wiki/File:DIMendeleevCab.jpg. Public Domain
2. Dmitri Mendeleev. http://commons.wikimedia.org/wiki/File:Mendelejevs_periodiska_system_1871.png. Pub-
lic Domain
3. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0
4. Chromium and krypton: User:Jurii/Wikimedia Commons; Arsenic: Aram Dulyan (Wikimedia: Aramgutang).
Chromium: http://commons.wikimedia.org/wiki/File:Chromium.jpg; Arsenic: http://commons.wikimedia.org
/wiki/File:Native_arsenic.jpg; Krypton: http://commons.wikimedia.org/wiki/File:Krypton-glow.jpg. Chromium
and krypton: CC-BY 3.0; Arsenic: Public Domain
5. Silver tray: The Living Room; Copper wire: Flickr:Flavio~; Aluminum foil: User:MdeVicente/Wikimedia
Commons. Silver tray: http://www.flickr.com/photos/thelivingroominkenmore/4546677601/; Copper wire:
http://www.flickr.com/photos/37873897@N06/6154424083/; Aluminum foil: http://commons.wikimedia.or
g/wiki/File:Aluminio.jpg. Silver tray: CC BY 2.0; Copper wire: CC BY 2.0; Aluminum foil: Public Domain
6. Sulfur: Ed Uthman; Pencil: Robert Lopez; Matches: Charles Knowles. Sulfur: http://www.flickr.com/photos
/euthman/9183618186/; Pencil: CK-12 Foundation; Matches: http://www.flickr.com/photos/theknowlesgall
ery/4536616288/. Sulfur: CC BY 2.0; Pencil: CC BY-NC 3.0; Matches: CC BY 2.0
7. User: Jurii/Wikimedia Commons. Silicon: http://commons.wikimedia.org/wiki/File:Silicon.jpg; Antimony:ht
tp://commons.wikimedia.org/wiki/File:Antimony-piece.jpg; Boron: http://commons.wikimedia.org/wiki/File:B
oron.jpg. CC BY 3.0
8. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0
9. Salt: Dubravko Soric (Flickr:SoraZG). http://commons.wikimedia.org/wiki/File:Salt_shaker_on_white_back ́
ground.jpg. CC BY 2.0
10. Chalk: Steve A Johnson. http://www.flickr.com/photos/artbystevejohnson/4618054549/. CC BY 2.0
11. Battery: Robert Lopez; Thermometer: Flickr: dwstucke. Battery: CK-12 Foundation; Thermometer: http://c
ommons.wikimedia.org/wiki/File:Thermometer_-_by_Don.jpg. Battery: CC BY-NC 3.0; Thermometer: CC
BY 2.0
12. Aluminum cans: MoneyBlogNewz; Tin man: JD Hancock; Fertilizer and Selenium bottle: Christopher Auye-
ung. Aluminum cans: http://www.flickr.com/photos/moneyblognewz/5408772758/; Tin man: http://www.f
lickr.com/photos/jdhancock/4896517056/; Fertilizer and Selenium bottle: CK-12 Foundation. Aluminum
cans and Tin man: CC BY 2.0; Fertilizer and Selenium bottle: CC BY-NC 3.0
13. Christopher Auyeung. CK-12 Foundation. CC BY-NC 3.0
14. Balloon: LeAnn E. Crowe; Bulb: Christopher Auyeung. Balloon: http://www.flickr.com/photos/technicolo
r76/3705507804/; Bulb: CK-12 Foundation. Balloon: CC BY 2.0; Bulb: CC BY-NC 3.0
