|
The lanthanide or lanthanoid (IUPAC nomenclature) series comprises the fourteen elements with atomic numbers 58 through 71, from cerium to lutetium. All lanthanides are f-block elements, corresponding to the filling of the 4f electron shell. Lanthanum, which is a d-block element, may also be considered to be a lanthanide. All lanthanide elements form trivalent cations, Ln, whose chemistry is largely determined by the ionic radius, which decreases steadily from lanthanum to lutetium. From Wikipedia under the
GNU Free Documentation License  examsmagazine.com admin ue, 26 Jan 2010 15:21:14 GM Lanthanoids. - Electronic configuration, oxidation states, chemical reactivity and . lanthanoid. contraction. Actinoids - Electronic configuration and oxidation states. UNIT 17: CO-Ordination compounds. Introduction to co-ordination ...  treo.typepad.com Gareth Hatch Sat, 23 Jan 2010 13:00:00 GM The general consensus, both in that discussion, and elsewhere, is that they include the 15 . lanthanoid. elements and one or both of the elements yttrium and scandium. What they do NOT include, we're pretty certain, are metals such as ...  phlogistontheoryofcombustion.blog-giant.com admin hu, 25 Jun 2009 14:01:42 GM jakob berzelius friedrich august kekule von stradonitz ketone krypton . lanthanoid. lanthanum antoine lavoisier lawrencium lead justus von liebig liquid liquid oxygen lithium lutetium magnesium manganese ... From Google Blog Search: "lanthanoid"  marketwire.com Market Wire (press release) The term "rare earth elements" is a trade name for the 15 members of the lanthanoid series, plus yttrium, characterized by similar physical and chemical properties. Grades are usually reported as calculated rare earth oxides. ... From Google News Search: "lanthanoid" What are all the sub-divisions of the periodic table? Q. Please leave me full details. I know Group 2 is the alkaline earth metals then theres the Transition elements which are broken down to Lanthanoid series and actinoid series but what else is there??? Asked by patiencexo - Wed Oct 29 21:22:19 2008 - - 1 Answers - 0 Comments A. Patience, you must have patience. You have 3 major sub-division types. The first is the periods. The first one has 2 elements, H and He. The next has 8, the third 18 and so on. More on this later. The second subdivision are the groups. There are 8 main groups, the alkali metals, the alkaline earth metals, the group III metals, the group IV metalloids, the group V (from nitrogen to bismuth), group 6 (from oxygen, sulfur, germanium, etc., the halogens, and the more-or-less inert gases. Due to the way that electrons occupy orbitals and sub-orbitals, part of the third period elements show up after the fourth period elements begin. The fourth period starts with K and Ca, but the next 10 elements from Scandium are in the third… [cont.] Answered by cattbarf - Wed Oct 29 21:46:36 2008 Should Jadarite actually be considered Kryptonite? or should the true kryptonite be the one from Superman 3? Q. There are Two Recipes for Kryptonite. the one from Superman 3(Actually Radioactive) the one from Superman Returns (White powder) Which is the true Kryptonite? Scientists have recently declared that they have found real Kryptonite. sodium lithium boron silicate hydroxide is officially called Jadarite. they are claiming this to be kryptonite based on the the movie Superman Returns. But in Superman 3: Superman vs. Superman, while the Molecular Structure is not given, the chemical composition of the kryptonite molecule is given as Plutonium: 15.08% (Pu: Element 94, Actinoid Metal) Tatalum: 18.06% (an alternate spelling of Tantalum; Ta: Element 73, Metal) Xenon: 27.71% (Xe: Element 54, Noble Gas) Promethium: 24.02% (Pm: Element 6, Lanthanoid… [cont.] Asked by Kuraimizu - Thu Apr 26 18:57:45 2007 - - 3 Answers - 1 Comments A. Yeah. Since Richard Pryor's rock drives Supes to his knees, the material in Superman 3 is clearly the right stuff. Let the geologists have their fun, but this is OUR field and they are the amateurs here. Not that it matters (see above for sufficient reason), but the general awfulness of Superman Returns and the despicable way they just did a re-run of Superman (1), pretty much leave me cold about anyone associated with the movie having gotten anything about it right. They'd probably pee IN not OUT if that cock-up (sorry, how could I not drop that (as awful as their movie) pun???) were physically possible. In the world of real things, results matter. If tossing virgins into a volcano placates a god and the harvest returns, then that's… [cont.] Answered by roynburton - Thu Apr 26 19:23:16 2007 Home work help?
Q. I dont understand what my teacher wants me to do for this question. we are studying the periodic tables of elements and she wants me to link some things. construct a concept map/web that shows how the following concepts are linked together: element, periodic table, atomic number, periods/series, groups/families, alkali metals, alkaline earth metals, halogen, noble gas chalcogen, lanthanide, and actinide. I got some definisions of some of the words. Group/Family: Elements in the same vertical column of the periodic table. Halogens: Elements in group 17 of the periodic table. Noble gases: Eements in group 18 at the periodic table. Periods/Series: horizontal row of elements in the periodic table. Alkali Metals: Elements in group 4. … [cont.] Asked by some,random,guy - Sun Feb 4 10:46:52 2007 - - 1 Answers - 0 Comments A. A concept Map is basically a web. So Make a circle at the top of a piece of paper. I would start with periodic table and link that to group/family and periods/series, then I would also link all of that to elements, as the periodic table shows all the elements, 92 natural and 20 man made elements. Then link atomic number to the elements and then link all the other stuff to the Elements as well. Since they are all elements. Just make elements a large bubble and link that to all of the noble gases, and the alkaline metals etc. Answered by coolliz2444 - Sun Feb 4 11:12:29 2007 From Yahoo Answer Search: "lanthanoid" |
