Credit to www.sciencenotes.org for some of the images used in this website.
Links to images used:
History:
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/150289_orig.jpg (Joseph Priestley)
https://sp.yimg.com/xj/th?id=OIP.M9a52f3e9f92540beca867fe4092b5cbdo2&pid=15.1&P=0&w=300&h=300 (Antoine Lavoisier)
https://sp.yimg.com/xj/th?id=OIP.M9a0a26211f4e98c40645049ee26c0feco0&pid=15.1&P=0&w=300&h=300 (history: oxygen)
https://sp.yimg.com/xj/th?id=OIP.M1fbe45627c9c99c9c08c8fd6162715eeH0&pid=15.1&P=0&w=300&h=300 (structure of calcium atom)
Alkali Metals:
https://sp.yimg.com/xj/th?id=OIP.Me2d707bb9de8f9e4747685750f72f408o0&pid=15.1&P=0&w=300&h=300 (lithium)
http://www.daviddarling.info/images/sodium.jpg (sodium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5906356.jpg (potassium)
https://sp.yimg.com/xj/th?id=OIP.M5e5de5456b98ec07f7e2f703df85366eo0&pid=15.1&P=0&w=300&h=300 (rubidium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/9772983.jpg (cesium)
http://upload.wikimedia.org/wikipedia/commons/8/89/Mineral_Calcopirita_GDFL118.jpg (francium)
Alkaline Earth Metals:
http://www.greatmining.com/mining_images/berylliumrock.jpg (beryllium)
https://sp.yimg.com/xj/th?id=OIP.M86a7d8a752c6837668dbac969514b801o0&pid=15.1&P=0&w=300&h=300 (magnesium)
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401379097/ibjt6mujtqtp1evtx61w.jpg (calcium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/6671740.jpg?382 (strontium)
http://www.greatmining.com/images/barium.jpg (barium)
http://images4.wikia.nocookie.net/__cb20100830215416/turtledove/images/d/d0/Radium.jpg (radium)
Transition Metals:
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/7245309.jpg (scandium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5141994.jpg (titanium)
http://www.marudharmetal.com/images/ferro-vanadium-250x250.jpg (vanadium)
http://www.veekaysmelters.com/uploads/products/Chrome%20Metal%20(AT).JPG (chromium)
https://sp.yimg.com/xj/th?id=OIP.M7168d14b2d04aa0133d7f4155952249bo0&pid=15.1&P=0&w=300&h=300 (manganese)
https://sp.yimg.com/xj/th?id=OIP.Mad3a49e4f6af84a202b7f9ca18699fdao0&pid=15.1&P=0&w=300&h=300 (iron: rust)
https://sp.yimg.com/xj/th?id=OIP.M46397a56bcdc6d90ecced24ac070119fo0&pid=15.1&P=0&w=300&h=300 (cobalt blue paint)
http://www.lookchem.com/images/PeriodicTable/Nickel%20.jpg (nickel)
http://evansmining.com/wp-content/uploads/2012/09/copper-wire-2.jpg (copper)
http://bgfons.com/upload/zinc_texture2455.jpg (zinc)
http://www.what-is-nanotechnology.com/images/Ta.jpg (yttrium metal)
http://i.ebayimg.com/00/s/MTQyMlgxNjAw/z/QX8AAOSwDk5UFxNf/$_35.JPG (zirconium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/1510724.png?1463884663 (technetium)
Post-Transition Metals:
http://img.wikinut.com/img/2is39c-2-u0rqug4/jpeg/180x300/Gallium-hand.jpeg (melting gallium)
Lanthanide Series:
http://businesslife.ba.com/Media/images/rareh-Business-Life-Lanthanum-credit-SPL-3d1e919c-6d84-4646-aa05-c4e530dcc448-0-450x521.jpg (lanthanum)
http://upload.ecvv.com/upload/Product/20122/China_Cerium_metal_powder20122221057481.jpg (cerium)
Nonmetals:
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401379097/ibjt6mujtqtp1evtx61w.jpg (hydrogen is a nonmetal)
http://www.desktopas.com/files/2013/06/Outer-Space-Eagle-Nebula-1280x720.jpg (hydrogen in nebula)
http://4.bp.blogspot.com/-EKrOPraUGV4/T9JpUcL9FZI/AAAAAAAAAQg/Q6aPkWe51iw/s1600/diamond.jpg (carbon: diamond)
http://www.chemistrydemos.co.uk/Images/Liquid%20Nitrogen.jpg (liquid nitrogen)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5918716.gif?128 (liquid oxygen)
http://images-of-elements.com/red-phosphorus.jpg (phosphorus)
http://mokhtarco.com/en/components/com_virtuemart/shop_image/product/Sulfur_5211e18170b90.jpg (sulfur)
http://images-of-elements.com/selenium-2.jpg (selenium)
Halogens:
http://sciencenotes.org/wp-content/uploads/2013/05/117-Ununseptium-Tile1.png (ununseptium periodic table entry)
Noble Gases:
http://images-of-elements.com/helium-2.jpg (glowing helium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/1280313.jpg?250 (glowing neon)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/2412033.jpg?259 (glowing argon)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/3929275.jpg?250 (glowing krypton)
http://upload.wikimedia.org/wikipedia/commons/5/5d/Xenon-glow.jpg (glowing xenon)
http://images-of-elements.com/radon.jpg (glowing radon)
http://sciencenotes.org/wp-content/uploads/2013/05/118-Ununoctium-Tile.png (ununoctium periodic table entry)
Random:
http://sciencenotes.org/wp-content/uploads/2014/11/ColorfulPeriodicTable.png (periodic table on home page)
https://sp.yimg.com/xj/th?id=OIP.Mdeac77efe1f55569a018c1591dbfb7b0o0&pid=15.1&P=0&w=300&h=300 (slideshow picture #1: osmium)
https://sp.yimg.com/xj/th?id=OIP.M3833229a8e19ee46b4d4cfff3c01f243o0&pid=15.1&P=0&w=300&h=300 (slideshow picture #2: 1869 periodic table)
http://www.timothysheaonline.com/wp-content/uploads/2012/11/20121027_new-york_live_first-edit_26.jpg (slideshow picture #3: street)
http://chemicool.com/elements/images/300-calcium-metal.jpg (gallery #1)
http://www.homewetbar.com/images/prod/neon-sign-open-oval34942.jpg (gallery #2)
https://sp.yimg.com/xj/th?id=OIP.Mf19dad6b24bcd84e3ebb4cf0d3f56856H0&pid=15.1&P=0&w=300&h=300 (gallery #3)
History:
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/150289_orig.jpg (Joseph Priestley)
https://sp.yimg.com/xj/th?id=OIP.M9a52f3e9f92540beca867fe4092b5cbdo2&pid=15.1&P=0&w=300&h=300 (Antoine Lavoisier)
https://sp.yimg.com/xj/th?id=OIP.M9a0a26211f4e98c40645049ee26c0feco0&pid=15.1&P=0&w=300&h=300 (history: oxygen)
https://sp.yimg.com/xj/th?id=OIP.M1fbe45627c9c99c9c08c8fd6162715eeH0&pid=15.1&P=0&w=300&h=300 (structure of calcium atom)
Alkali Metals:
https://sp.yimg.com/xj/th?id=OIP.Me2d707bb9de8f9e4747685750f72f408o0&pid=15.1&P=0&w=300&h=300 (lithium)
http://www.daviddarling.info/images/sodium.jpg (sodium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5906356.jpg (potassium)
https://sp.yimg.com/xj/th?id=OIP.M5e5de5456b98ec07f7e2f703df85366eo0&pid=15.1&P=0&w=300&h=300 (rubidium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/9772983.jpg (cesium)
http://upload.wikimedia.org/wikipedia/commons/8/89/Mineral_Calcopirita_GDFL118.jpg (francium)
Alkaline Earth Metals:
http://www.greatmining.com/mining_images/berylliumrock.jpg (beryllium)
https://sp.yimg.com/xj/th?id=OIP.M86a7d8a752c6837668dbac969514b801o0&pid=15.1&P=0&w=300&h=300 (magnesium)
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401379097/ibjt6mujtqtp1evtx61w.jpg (calcium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/6671740.jpg?382 (strontium)
http://www.greatmining.com/images/barium.jpg (barium)
http://images4.wikia.nocookie.net/__cb20100830215416/turtledove/images/d/d0/Radium.jpg (radium)
Transition Metals:
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/7245309.jpg (scandium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5141994.jpg (titanium)
http://www.marudharmetal.com/images/ferro-vanadium-250x250.jpg (vanadium)
http://www.veekaysmelters.com/uploads/products/Chrome%20Metal%20(AT).JPG (chromium)
https://sp.yimg.com/xj/th?id=OIP.M7168d14b2d04aa0133d7f4155952249bo0&pid=15.1&P=0&w=300&h=300 (manganese)
https://sp.yimg.com/xj/th?id=OIP.Mad3a49e4f6af84a202b7f9ca18699fdao0&pid=15.1&P=0&w=300&h=300 (iron: rust)
https://sp.yimg.com/xj/th?id=OIP.M46397a56bcdc6d90ecced24ac070119fo0&pid=15.1&P=0&w=300&h=300 (cobalt blue paint)
http://www.lookchem.com/images/PeriodicTable/Nickel%20.jpg (nickel)
http://evansmining.com/wp-content/uploads/2012/09/copper-wire-2.jpg (copper)
http://bgfons.com/upload/zinc_texture2455.jpg (zinc)
http://www.what-is-nanotechnology.com/images/Ta.jpg (yttrium metal)
http://i.ebayimg.com/00/s/MTQyMlgxNjAw/z/QX8AAOSwDk5UFxNf/$_35.JPG (zirconium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/1510724.png?1463884663 (technetium)
Post-Transition Metals:
http://img.wikinut.com/img/2is39c-2-u0rqug4/jpeg/180x300/Gallium-hand.jpeg (melting gallium)
Lanthanide Series:
http://businesslife.ba.com/Media/images/rareh-Business-Life-Lanthanum-credit-SPL-3d1e919c-6d84-4646-aa05-c4e530dcc448-0-450x521.jpg (lanthanum)
http://upload.ecvv.com/upload/Product/20122/China_Cerium_metal_powder20122221057481.jpg (cerium)
Nonmetals:
http://file2.answcdn.com/answ-cld/image/upload/h_320,c_fill,g_face:center,q_60,f_jpg/v1401379097/ibjt6mujtqtp1evtx61w.jpg (hydrogen is a nonmetal)
http://www.desktopas.com/files/2013/06/Outer-Space-Eagle-Nebula-1280x720.jpg (hydrogen in nebula)
http://4.bp.blogspot.com/-EKrOPraUGV4/T9JpUcL9FZI/AAAAAAAAAQg/Q6aPkWe51iw/s1600/diamond.jpg (carbon: diamond)
http://www.chemistrydemos.co.uk/Images/Liquid%20Nitrogen.jpg (liquid nitrogen)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/5918716.gif?128 (liquid oxygen)
http://images-of-elements.com/red-phosphorus.jpg (phosphorus)
http://mokhtarco.com/en/components/com_virtuemart/shop_image/product/Sulfur_5211e18170b90.jpg (sulfur)
http://images-of-elements.com/selenium-2.jpg (selenium)
Halogens:
http://sciencenotes.org/wp-content/uploads/2013/05/117-Ununseptium-Tile1.png (ununseptium periodic table entry)
Noble Gases:
http://images-of-elements.com/helium-2.jpg (glowing helium)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/1280313.jpg?250 (glowing neon)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/2412033.jpg?259 (glowing argon)
http://20407283-924600525330914472.preview.editmysite.com/uploads/2/0/4/0/20407283/3929275.jpg?250 (glowing krypton)
http://upload.wikimedia.org/wikipedia/commons/5/5d/Xenon-glow.jpg (glowing xenon)
http://images-of-elements.com/radon.jpg (glowing radon)
http://sciencenotes.org/wp-content/uploads/2013/05/118-Ununoctium-Tile.png (ununoctium periodic table entry)
Random:
http://sciencenotes.org/wp-content/uploads/2014/11/ColorfulPeriodicTable.png (periodic table on home page)
https://sp.yimg.com/xj/th?id=OIP.Mdeac77efe1f55569a018c1591dbfb7b0o0&pid=15.1&P=0&w=300&h=300 (slideshow picture #1: osmium)
https://sp.yimg.com/xj/th?id=OIP.M3833229a8e19ee46b4d4cfff3c01f243o0&pid=15.1&P=0&w=300&h=300 (slideshow picture #2: 1869 periodic table)
http://www.timothysheaonline.com/wp-content/uploads/2012/11/20121027_new-york_live_first-edit_26.jpg (slideshow picture #3: street)
http://chemicool.com/elements/images/300-calcium-metal.jpg (gallery #1)
http://www.homewetbar.com/images/prod/neon-sign-open-oval34942.jpg (gallery #2)
https://sp.yimg.com/xj/th?id=OIP.Mf19dad6b24bcd84e3ebb4cf0d3f56856H0&pid=15.1&P=0&w=300&h=300 (gallery #3)