Mendelejev

Yes, but ethanol, for example, could create strong intermolecular forces with glycine. even Hydrogen bonds. SO, i still don't understand

Could someone explain me why glycine isn't soluble in organic solvents. My prof said this today !! If you take some pure glycine in water it should be a zwitterion, so there would be positive and negative charges. That means it would be very soluble in water. Secondly, the R-group in glycine is -H, not very apolar ! But organic solvents can be polar (methanol, ethanol, ...) and apolar (heptane, ...) !! So, it would be soluble in methanol and ethanol, but not in heptane. Then, why does he says it's NOT soluble at all in organic solvents, included methanol and ethanol ???

Do you have some sites with 3D representations of the periodic table ??? (A bit like visual elements, see above) !! I love the idea of representing the table as a landscape, a Periodic World !! For me, it's my dreamworld ! I know every spot and I can travel from element to element. You have the desert of metals with mostley metallic looks, but you also have the beautiful countries of the non-metals. You have the province of the alkalimetals, where you could better hide is it rains. Somwhere in the south you have an island with the more exotic metals, but watch out where you go, cause you could come in regions that could kill you in a few seconds because of their reactivity. I LOVE to travel in the fantastic world of the elements. Most people don't understand me, but for me it's paradise !!! (Peter Atkins, prof. chemistry in Oxford I think, has written a great book about his trip in this world, 'The periodic kingdom of the elements' ... it's my favourite chemistry book. I read it almost 15 times, again and again, and again ) So if anyone has some sites about this subject, please let me know. Thanx

I've just found a new shockwave application of the periodic table. Very nice 'design' periodic table where you can compare reactivity, EN, etc. *** http://loop1.aiga.org/common/modules/display/dsp_ContentTemplate01b.cfm?ContentID=130&CreateTemplate=0&NavType=SiblingCategory#

I was thinking ... why not make a thread where everyone can put great sites about the periodic table. Here are already some great sites. (**** = EXTREMELY GOOD, *** = VERY GOOD, ** = GOOD, * = NORMAL) **** http://www.vanderkrogt.net/elements/index.html Fantastic site !! You will find this site useful not only for the origins (etymology) of element names, but also for translations of each element name into numerous other languages. **** http://homepage.mac.com/dtrapp/Elements/mineral.html Origins of the element names. Very nice !!!! **** http://www.element-collection.com/index.html The Most Beautiful Periodic Table Displays in the World ! Great site for element collectors. **** http://www.chemsoc.org/viselements/pages/page3.html FANTASTIC SITE !! Just visit it !!!!! **** http://www.theodoregray.com/PeriodicTable/index.html The Wooden Periodic Table Table ... Yes, it really is a table. What, How, Why ... go check the site !! *** http://www.chemtopics.com/elements.htm A periodic table. Information includes a picture of the element (when available), a short background description with some ethymology, and links to other sites containing additional background and data. *** http://www.ch.cam.ac.uk/misc/weii/ Based on the Best Selling Book THE ELEMENTS ! Periodic table with biological data, geological data, physical data, etc. *** http://www.chemistrycoach.com/periodic_tables.htm Huge list of links for periodic tables !! *** http://soundamerica.com/sounds/comedy/Tom_Lehrer/ *** http://www.casualhacker.net/tom.lehrer/evening.html#elements Two great sites about Tom Lehrer's Song of The Element. Just Listen and enjoy !!! *** http://chemlab.pc.maricopa.edu/periodic/default.html Very nice site with periodic table, and an interavtive table of isotopes *** http://www.uky.edu/Projects/Chemcomics/ Periodic table : Click on an element to see a list of comic book pages involving that element. ** http://superdeluxe.com/elemental/ Chemistry and poetry together as never before. Curious? Explore the Periodic Table of Elements you know and love — with a twist ! Click on your favorite element for a poem. ** http://genchem.chem.wisc.edu/lab/PTL/PTL/Elements/H/H.html Periodic Table Live ! Nice, with some movies about the reaction of the elements with air / water / acid / Base ** http://cwx.prenhall.com/petrucci/medialib/media_portfolio/10.html Some movies and animations illustrating the periodic trends, etc. ** http://www.ch.cam.ac.uk/SGTL/elements/ Periodic table, colored by atomic weight, number of isotopes, melting point, etc. ** http://www.anachem.umu.se/cgi-bin/pointer.exe?PeriodicTables List of links for Periodic Tables and Related Material. ** http://www.robresint.co.uk/default.asp?section=periodic A periodic table with quotations on the elements. ** http://www.areopagus.net/grkelements.htm A table of the elements with mythological influences, or at least have the Greek language to thank for their names ... this site knows all about it. * http://center.acs.org/periodic/tools/PT.html A periodic table. Nice Shockwave application. * http://www.apsidium.com/new_pt/newtab.htm New periodic table up to element 224 * http://nautilus.fis.uc.pt/st2.5/index-en.html A periodic table with a bit of history and biographies. * http://www.monroecc.edu/wusers/flanzafame/ClPerDates.pdf PDF file : the periodic table, colored by year of discovery ENJOY