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Topic: Periodic table (standard)


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  Chemistry - Periodic table
The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements.
A group is a vertical column in the periodic table of the elements.
The original table was created without a knowledge of the inner structure of atoms: if one orders the elements by atomic mass, and then plots certain other properties against atomic mass, one sees an undulation or periodicity to these properties as a function of atomic mass.
www.chemistrydaily.com /chemistry/Periodic_table   (862 words)

  
 Chemistry: WebElements Periodic Table
The periodic "law" of chemistry recognises that many properties of the chemical elements are periodic functions of their atomic number (the number of protons within the element's atomic nucleus).
The periodic table is an arrangement of the chemical elements ordered by atomic number in columns (groups) and rows (periods) presented so as to emphasize their periodic properties.
The relative merits of various other periodic table organisations is still the subject of debate.
www.webelements.com   (426 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.
Periodic Tables (http://www.chemistrycoach.com/periodic_tables.htm) (in case you were thinking that the Internet needed one more)".
www.worldofmolecules.com /elements   (679 words)

  
  CalendarHome.com - - Calendar Encyclopedia   (Site not responding. Last check: )
The periodic table of the chemical elements is a tabular method of displaying the chemical elements, devised by the Russian chemist Dmitri Mendeleev in 1869.
The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behavior.
A period is a horizontal row in the periodic table of the elements.
encyclopedia.calendarhome.com /cgi-bin/encyclopedia.pl?p=Periodic_table   (2493 words)

  
  Periodic table - Wikipedia, the free encyclopedia
The modern periodic table is arranged so that elements in each column of the table have the same number of valence electrons and therefore usually exhibit similar chemical properties.
Mendeleev's and Moseley's development of the periodic table was one of the greatest achievements in modern chemistry.
Because of the importance of the outermost shell, the different regions of the periodic table are sometimes referred to as periodic table blocks, named according to the sub-shell in which the "last" electron resides, e.g.
en.wikipedia.org /wiki/Periodic_table   (1444 words)

  
 Encyclopedia: Periodic table (standard)   (Site not responding. Last check: )
A period 4 element is one of the chemical elements in the fourth row (or period) of the periodic table of the elements.
A period 5 element is one of the chemical elements in the fifth row (or period) of the periodic table of the elements.
A period 7 element is one of the chemical elements in the seventh row (or period) of the periodic table of the elements.
www.nationmaster.com /encyclopedia/Periodic-table-(standard)   (6675 words)

  
 Periodic Table of the Elements Sodium
Born into a large family of doctors, metallurgists, chemists, physicists, periodic table of the elements sodium and teachers, his curiosity was encouraged periodic table of the elements sodium and abetted by aunts, uncles, parents, periodic table of the elements sodium and older brothers.
Periodic table - The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev.
Periodic table group - A periodic table group is a vertical column in the periodic table of the chemical elements.
sc70.museumpessoa.com /periodictableoftheelementssodium.html   (1329 words)

  
 periodic table — FactMonster.com
Periodic Table of the Elements: Beryllium - Periodic Table of the Elements: Beryllium 4 Be Beryllium 9.01218 2 · 2
Periodic Table of the Elements: Hydrogen - Periodic Table of the Elements: Hydrogen 1 H Hydrogen 1.00794 1
Periodic Table of the Elements: Boron - Periodic Table of the Elements: Boron 5 B Boron 10.81 2 · 3
www.factmonster.com /ce6/sci/A0838327.html   (759 words)

  
 Education Resources » Periodic table
The periodic table of the chemical elements is a tabular method of displaying the chemical elements, first devised in 1869 by the Russian chemist Dmitri Mendeleev.
The periodic table is now ubiquitous within the academic discipline of chemistry, providing an extremely useful framework to classify, systematize and compare all the many different forms of chemical behaviour.
The main value of the periodic table is the ability to predict the chemical properties of an element based on its position in the table.
www.thecatalyst.org /resource/2006/04/21/Periodic-table   (1991 words)

  
 Periodic table - Simple English Wikipedia
In the table, elements are in increasing order of their atomic numbers.
The elements are arranged in periods and groups of the Periodic Table.
The period number of an element is equal to the number of electrons in the outermost shell.
simple.wikipedia.org /wiki/Periodic_table   (388 words)

  
 periodic table - Encyclopedia.com
periodic table chart of the elements arranged according to the periodic law discovered by Dmitri I. Mendeleev and revised by Henry G. Moseley.
In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled Periodic Table).
The elements of a period are characterized by the fact that they have the same number of electron shells; the number of electrons in these shells, which equals the element's atomic number, increases from left to right within each period.
www.encyclopedia.com /doc/1E1-periodtbl.html   (1109 words)

  
 (Almost) All the information you can get from the periodic table   (Site not responding. Last check: )
periodic table is basically just a list of all the elements that we know about.
Hydrogen is element #1 in the periodic table.
You can find the electron configurations of any element using the periodic table by remembering that the two rows at the far left are S rows, the transition metals in the middle are D rows, the main block elements to the right are P rows, and the lanthanides and actinides are F rows.
misterguch.brinkster.net /periodictable.html   (818 words)

  
 The Periodic Table
A necessary prerequisite to the construction of the periodic table was the discovery of the individual elements.
In 1898, William Ramsey suggested that argon be placed into the periodic table between chlorine and potassium in a family with helium, despite the fact that argon's atomic weight was greater than that of potassium.
Although Mendeleev's table demonstrated the periodic nature of the elements, it remained for the discoveries of scientists of the 20th Century to explain why the properties of the elements recur periodically.
www.wou.edu /las/physci/ch412/perhist.htm   (1833 words)

  
 About the Periodic Table Website   (Site not responding. Last check: )
This website is an interactive periodic table with a comprehensive database of element properties, which can be searched and collated in novel and useful ways.
Their tables were similar - they acknowledged each other's work - the differences are subtle but important: Meyer's table was an accurate (for the time) accounting of the known facts about each element, such as melting point and atomic volume.
In it, the periodic relationship between chemical groups, that is, elements with a similar stoichiometry of reaction, is clearly illustrated.
chemlab.pc.maricopa.edu /periodic/about.html   (679 words)

  
 Open Directory - Science: Chemistry: Periodic Table
David's Whizzy Periodic Table - Applet-based table with visualizations of the electron shell model, the nucleus, the visual emission spectrum, and energy levels of the electrons.
Periodic Table of the Elements - [Basic data, includes printable version] Information on each of the chemical elements and data on their properties.
Periodic Table of the Elements - [Basic data] Interactive periodic table of the elements, additional information on heat of vaporization, heat of fusion and specific heat.
www.findthelinks.com /dmozurl/Science/Chemistry/Periodic_Table   (1426 words)

  
 Facts about the Periodic Table
Dimitri Mendeleev, the father and inventor, of the Periodic Table, was born on February 7, 1834 in Tobolsk, Siberia in Russia.
Mendeleev then went further, using the remaining gaps and spaces in his periodic table, he correctly concluded that a group of yet unknown elements must exist to fill in the gaps in the Periodic Table, this was the group we now know as the lanthanides.
Fifty years after Dimitri Mendeleev created the Periodic table, the British scientist Henry Moseley discovered that the number of protons in the nucleus of a particular type of atom was always the same.
www.facts-about.org.uk /science-periodic-table.htm   (579 words)

  
 ALEX - Alabama Learning Exchange
Students will utilize the periodic table in determining the number of electrons, protons, and neutrons for an atom; determining the number of outer shell electrons; predicting possible ionic charges for elements; and recognizing metals, nonmetals, metalloids, and noble gases.
Periodic Tables of the Elements should be obtained and laminated for use during the game.
This periodicity is the basis for the organization of the Periodic Table of Elements.
alex.state.al.us /lesson_view.php?id=229   (1314 words)

  
 Stephanie's Periodic Table
The periodic table is an extremely helpful tool when it comes to understanding why elements act the way that they do.
Even though the table is arranged in a way that allows students to systematically understand it, trying to teach this to 11th and 12th graders is very difficult.
It can be used to discuss anything about the periodic table and is nice if students have questions that they may not want to ask in class or if they have questions that come up at home.
www.pitt.edu /~sst4/periodictable.html   (2356 words)

  
 Web Elements Periodic Table
Thirteen papers and essays, divided into three groups, reflect the period corresponding to the initial establishment of the periodic law, a period of priority disputes and experimental confirmations, and a final period of general acceptance for the law and increasing international recognition for Mendeleev.
Further chapters reveal the relationships between the electronic configurations of the development of the elements and some properties of their fluorides and oxides across the periods and down the groups of the periodic law.
After a brief discussion of the Periodic Table as we know it is based on ASCII, the most widely used 7-bit character encoding.
vi24.mndine.com /webelementsperiodictable.html   (1224 words)

  
 Periodic table - Pharmpedia   (Site not responding. Last check: )
Mendeleev's discovery of the periodic table was one of the greatest developments in modern chemistry; chemists for the first time were able to quantitatively explain the behaviour of the elements and to predict the existence of undiscovered ones.
John Alexander Reina Newlands, who in 1865 noticed that the elements of similar type recurred at intervals of eight, which he likened to the octaves of music, though his law of octaves was ridiculed by his contemporaries.
Periodic Table of the Fermi Surfaces of Elemental Solids".
www.pharmpedia.com /Periodic_table   (1355 words)

  
 The Periodic Table
Identify elements in various regions of the Periodic Table: metals, nonmetals, metalloids, alkali metals, alkaline earth metals, halogens, noble gases, transition elements, inner transition elements, lanthanides and actinides.
The Periodic Table of the Elements is a way to arrange the elements to show a large amount of information and organization.
The Lanthanides belong to Period 6, and the Actinides belong to Period 7.
gpc.edu /~pgore/PhysicalScience/Periodic-table.html   (1468 words)

  
 ipedia.com: Periodic table Article   (Site not responding. Last check: )
Despite their dramatic differences in mass within the group, their allotropes have very similar properties: They are all highly corrosive (meaning they combine readily with metals to form metal halide salts); chlorine and fluorine are gases, while bromine is a very low-boiling liquid; chlorine and bromine at least are highly colored.
Finally, in 1869, the German Lothar Meyer and the Russian chemist Dmitry Ivanovich Mendeleev almost simultaneously developed the first periodic table, arranging the elements by mass.
Jacobs, Bob, "Periodic Tables (in case you were thinking that the Internet needed one more)".
www.ipedia.com /periodic_table_1.html   (847 words)

  
 Periodic table (standard) - Wikipedia, the free encyclopedia
For information about the period table of elements, see Periodic table.
Note: Although californium (Cf, 98) is not Earth-primordial, it (and its decay products) does occur naturally: its electromagnetic emissions are regularly observed in supernova spectra.
Periods:  1  -  2  -  3  -  4  -  5  -  6  -  7  -  8  -  9
en.wikipedia.org /wiki/Periodic_table_(standard)   (205 words)

  
 Mendeleev's First Periodic Table
Mendeleev was one of a number of independent discoverers of the periodic law in the 1860s--that number ranging from one [Leicester 1948] to six [van Spronsen 1969] depending on the criteria one adopts.
Some tables place hydrogen with the alkali metals (lithium, sodium, etc.), some with the halogens (fluorine, chlorine, etc.), some with both, and some in a box of its own detached from the main body of the table.
In Mendeleev's 1871 table [Mendeleev 1871] the missing element is correctly placed between calcium and titanium, and as an analogue of yttrium.
web.lemoyne.edu /~giunta/EA/MENDELEEVann.HTML   (2230 words)

  
 Standard 1 Objective 2   (Site not responding. Last check: )
The periodic table is arranged by # of protons.
These predictions are based on the trends shown by the arrangement of the elements on the periodic table.
One period to research the IUPAC name and diagram the square and write up the final draft of their report.
www.usoe.k12.ut.us /CURR/Science/core/assess/chem/1-2.html   (737 words)

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