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Topic: Periodic table of the elements

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In the News (Wed 17 Apr 19)

  Periodic Tables   (Site not responding. Last check: 2007-11-07)
The Periodic Table of the Elements (Morgan, UVm)
Periodic Table of the Elements University of Colorado
Periodic Table of the Elements Covalent Radius MIT
www.chemistrycoach.com /periodic_tables.htm   (1659 words)

 The Periodic Table of Elements
The periodic table of the chemical elements is a tabular display of the known chemical elements.
group is a vertical column in the periodic table of the elements.
However, Mendeleev plotted a few elements out of strict mass sequence in order to make a better match to the properties of their neighbours in the table, corrected mistakes in the values of several atomic masses, and predicted the existence and properties of a few new elements in the empty cells of his table.
www.worldofmolecules.com /elements   (679 words)

 CHEMTUTOR PERIODIC CHART   (Site not responding. Last check: 2007-11-07)
The integer number in the box with the element symbol is the atomic number of the element and also the number of protons in each atom of the element.
The Lanthanides belong to Period 6, and the Actinides belong to Period 7.
Elements 103 through 109 have been manufactured, and they have been named by the IUPAC (International Union of Pure and Applied Chemistry), but they are not of much importance to this course.
www.chemtutor.com /perich.htm   (3985 words)

 Periodic Table of the Elements [encyclopedia]   (Site not responding. Last check: 2007-11-07)
The number of elements in a period increases as one traverses down the periodic table because as the energy level of the atom increases, the number of energy sub-levels per energy level increases.
Elements that lie in the same column on the periodic table (called a "group") have identical valance electron configurations and consequently behave in a similar way chemically.
Elements 110 and 111 were discovered by the same group of scientists in 1994.
www.kosmoi.com /Science/Chemistry/Elements/Table   (694 words)

 The Periodic Table
The lanthanide elements (row 6) and the actinide elements (row 7) are in most cases separated from the rest of the table by being placed beneath the table.
Elements increase in their atomic masses as you move down rows of the table, but they change in their chemical properties.
The periodic table is divided into three main sections: the metals, the nonmetals, and the metalloids.
www.chem.lsu.edu /lucid/tutorials/Periodic_Table.html   (531 words)

 A Circular Periodic Table of the Elements   (Site not responding. Last check: 2007-11-07)
The development of the periodic table of the elements by Mendeleyev was one of the great scientific achievements of the nineteenth century.
The table contains the normal sequence of atomic orbitals, 1s, 2sp, 3spd, 4spdf, etc., except that the s and p orbitals are combined into the same electron shell.
Each element is placed in the shell that is primarily responsible for it's properties.
www.nfinity.com /~exile/periodic.htm   (380 words)

 Periodic Table of the Elements Meet and Learn site: for science; instructors teaching / studentslearning   (Site not responding. Last check: 2007-11-07)
A general definition of the traditional Periodic Table is on another screen.
Due to popular request, we provide a Periodic Table History for your edification, including a bit about Dr. Glenn Seaborg's Actinides as well as Mendeleef's original conception of the periodic table of the chemical elements.
The Comical Elements page will contain contributions by you and other friends of Chemistry to give us a chuckle or a challenge, and for your edification, we have checked out some links to periodic table related sites that are wonderfully informative about the elements.
periodictable.com   (403 words)

 Home page:The Extended Periodic Table Of The Elements   (Site not responding. Last check: 2007-11-07)
The difficulty arises partly because of uncertainty of the exact point at which the energetically similar 5g and 6f orbitals begin to fill and partly because calculations indicate that the 8p and 7d orbitals may be very close in energy to the 5g and 6f orbitals.
The prediction of properties on the basis of an orderly extrapolation appears to be of doubtful validity, however, in this heavy-element region of the periodic table.
The placement of the elements in the heaviest portion of the periodic table as shown in the [periodic table] is, therefore, probably also of only formal significance." Transuranium Elements, Encyclopaedia Britannica, 1999-2000, (Britannica.com).
jeries.rihani.com   (1271 words)

To chemists, however, the periodic table reveals the organizing principles of matter, which is to say, the organizing principles of chemistry.
New elements were discovered that filled in the holes Mendeleyev left in his table, and their atomic weights and chemical properties corresponded with remarkable accuracy to Mendeleyev’s predictions.
The periodic table is so central to chemistry that it seemed natural to devote a special issue to it and the elements that compose it as we celebrate CandEN’s 80th anniversary.
pubs.acs.org /cen/80th/elements.html   (487 words)

 The Periodic Table of Elements
An element is a substance that cannot be broken down into simpler substances through ordinary chemistry--it is not destroyed by acids, for example, nor changed by electricity, light, or heat.
The three new elements were respectively discovered by a French, a Scandinavian, and a German scientist, each of whom named the element in honor of his country or region.
Claiming a new element now meant not only identifying its unique chemical properties, but finding the atom's atomic weight so the element could be fitted into the right slot in the periodic table.
www.aip.org /history/curie/periodic.htm   (990 words)

 Chem4Kids.com: Elements & Periodic Table: Periodic Table
In the periodic table, elements have something in common if they are in the same row.
All of the elements in a period have the same number of atomic orbitals.
All of the elements in the second row (the second period) have two orbitals for their electrons.
www.chem4kids.com /files/elem_pertable.html   (397 words)

 EniG. Periodic Table of the Elements
The periodic Table can be incorporated into presentation, the change of temperature automatically started and the programme closed.
Periodic table of the elements can show all the names in one of 7 languages.
The element in the Periodic Table is selected by the left click and its characteristics are changed by the right click.
www.ktf-split.hr /~eni/toys/pse-e.html   (950 words)

 Periodic Library   (Site not responding. Last check: 2007-11-07)
Periodic Library is an interactive periodic table of the elements.
If you wish to have a more in-depth look at one of the elements, simply double-click when you are over the desired element, and you will be returned to the main window where the element you have chosen will be selected and ready to view in the element information window.
The element naming scheme that was approved by the IUPAC on August 30th, 1997 has been included in the list of choices.
www.orbit.org /perlib   (750 words)

 Inorganic Chemistry Resources
Periodic trends in the radii of elements and their ions are a common topic in general and more advanced inorganic chemistry courses.
As an inorganic chemist I like to think of the periodic table as three dimensional, involving both elements and their oxidation states.
There are two buttons that color the atoms by the sections of the periodic table, but do not differentiate by atomic charge.
www.wsu.edu /~wherland   (463 words)

 Chemistry: Periodic Table and More
Periodic Table first discovered in 1869 by Dmitry I. Mendeleyev is a way of presenting all the elements so as to show their similarities and differences.
Elements 58 to 71 are known as lanthanide or rare earth elements.
Elements 90 to 103 are known as the actinide elements.
www.chemicool.com   (226 words)

 Chemistry Teaching Resources - Periodic Tables and Related Material
A clickable periodic table with VRML 1.0 representations of the atoms.
The periodic table is supplied by Resource-World.Net, an educational site designed to give viewers a greater appreciation for where the materials we depend upon for every day life come from and the processes involved in making them.
A new periodic table of the elements that provides color-coded images, which are easy-to-remember, and produce original, visual patterns.
www.anachem.umu.se /cgi-bin/pointer.exe?PeriodicTables   (2509 words)

 USATODAY.com - Scientists create new 'superheavy' elements   (Site not responding. Last check: 2007-11-07)
The new element 115 was created on occasions when the nuclei of the calcium and americium fused.
The 115 and 113 are the new elements' atomic numbers, which refer to the number of protons in their nuclei.
In nature, scientists theorize, they would belong to a special class of superheavy elements known as the "region of stability" that have a much longer life because the shell-like structure of their nuclei contain the highest numbers of precisely arranged protons and neutrons.
www.usatoday.com /news/science/2004-02-01-new-elements_x.htm   (666 words)

 List of Elements of the Periodic Table - Sorted by Atomic Number
Elemental composition of crustal rocks differ between different localities (see article).
C, that is taken as a standard element with an atomic mass of 12.
Isotope of an element is defined by the sum of the number of protons and neutrons in its nucleus.
www.science.co.il /PTelements.asp   (516 words)

 The educational encyclopedia, periodic table of the elements   (Site not responding. Last check: 2007-11-07)
Environmental chemistry: periodic table of elements comprehensive data on elements including scores of properties, element names in many languages and most known nuclides is provided by this periodic table.
Periodic table of the elements interactive Periodic Table with loads of data aimed at school children
Periodic table the periodic table of elements is a chart that assists you in finding information on separate elements, each element contains a link to a page that explains its chemical properties, and its health effects and environmental effects
users.telenet.be /educypedia/education/sciencechemistrytable.htm   (255 words)

 Periodic Table of the Elements
For elements have no stable nuclides, the value enclosed in brackets indicates the mass number of the longest-lived isotope of the element.
However three such elements (Th, Pa and U) do have a characteristic terrestrial isotopic composition, and for these an atomic weight is tabulated.
Periodic table of the elements is prepared for prints in PostScript (PS) and Portable Document Format (PDF) in two version
www.ktf-split.hr /periodni/en   (496 words)

 The Periodic Table of the Elements
Cosmic abundance of elements is taken from the Realm of the Universe, by George O. Abell (Holt, Rinehart, and Winston, Inc. 1976--Abell's catalogue of galaxy clusters has now enshrined his name to the far reaches of the universe).
This table is not intended, therefore, as a resource for chemistry, physics, or minerology students.
The coordination of atom and ion sizes is thus another element in the geometry of chemistry and minerology.
www.friesian.com /atoms.htm   (967 words)

 Periodic Table
See also essay on the periodic table, a chart of the chemical elements, and the science section of the Homework Center.
Chemistry: The Periodic Table of the Elements (The New York Public Library Science Desk Reference)
The nature of things: attempts to change the periodic table raise eyebrows.
www.infoplease.com /periodictable.php   (129 words)

 Periodic Table   (Site not responding. Last check: 2007-11-07)
The number on top of the element's symbol is its atomic number, Z (the number of protons in the nucleus).
The number underneath the symbol is the relative atomic mass of the element.
When elements were discovered, by who, and the derivation of names and symbols.
www.ausetute.com.au /pertable.html   (148 words)

 Chem4Kids.com: Elements & Periodic Table
Elements are the building blocks of all matter.
Sure, they are smaller than the atoms of an element, but only when they group with other quarks do they form atoms that have recognizable traits.
While there may be more out there to discover, the basic elements remain the same.
www.chem4kids.com /files/elem_intro.html   (332 words)

 Alternative Periodic Tables   (Site not responding. Last check: 2007-11-07)
This is the familiar short form of the periodic table where the lanthanide and actinide elements are shown below the remainder of the table.
This is a 3-D periodic table constructed by Paul Giguere based primarily on the electronic structure of the atoms.
This is a periodic table constructed by Bruce Railsback that locates elements according their occurence as ions in nature, rather than according to the configuration of their outer-shell electrons in their elemental states based primarily on the electronic structure of the atoms.
www.wou.edu /las/physci/ch412/alttable.htm   (304 words)

 ENIG-PERIODIC TABLE OF ELEMENTS 2.11   (Site not responding. Last check: 2007-11-07)
Periodic Table of the Elements - [ Traduzca esta página ] Hrvatski EniG.
Periodic Table of the Elements 2.11 contains the basic data about the element in 7 languages (Croatian, English, French, German, Italian, Portuguese, and...
Periodic Table of the Elements 2.11, Status - New, Rating - 5,...
www.downloady.net /enig-periodic-table-of-elements-2-11.htm   (149 words)

 Detailed Color Printable Periodic Table
The element names below are displayed in American English.
This full-size color-coded printable periodic table of elements (sometimes called a periodic chart or table of chemical elements) has most important information (atomic number, chemical symbol, element name, atomic weight, electron configuration, state of matter at 298 K, manmade vs. natural, and class) on one single page.
The names of elements 112-118 are the Latin equivalents of those numbers.
www.dayah.com /periodic   (163 words)

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