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Topic: Periodic table block


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  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.
The number of electrons in outer shell is the same as the number of the group (e.g.
The block of elements between groups II and III are called transition metals.
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  Periodic Table - Search View - MSN Encarta
Periodic Table, table of the chemical elements arranged to illustrate patterns of recurring chemical and physical properties.
The periodic table has been published in various shapes and sizes, but the most commonly used modern form begins with a column of group 1 metals on the left-hand side, followed by a column of group 2 alkaline earth metals.
His version of the table was the first to accommodate all the known elements and also successfully predicted the existence of several elements that had not yet been discovered.
encarta.msn.com /text_761586387__1/Periodic_Table.html   (1213 words)

  
  Encyclopedia: Periodic table (block)   (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-(block)   (4912 words)

  
 Periodic table - Wikipedia, the free encyclopedia
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.
Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century.
en.wikipedia.org /wiki/Periodic_table   (1497 words)

  
 Kids.Net.Au - Encyclopedia > Periodic table
The periodic table of the chemical elements is a display of the known chemical elements, arranged by electron structure so that many chemical properties vary regularly across the table.
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.
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.
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 Periodic table block   (Site not responding. Last check: )
In the periodic table, the areas known as blocks are named after atomic orbital s.
Periodic Table ADventure [No data] Includes the history of the periodic table and information on the structure of atoms and the periodic table.
Periodic Table ADventure Includes the history of the periodic table and information on the structure of atoms and the periodic table.
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 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   (395 words)

  
 Periodic table - Pharmpedia   (Site not responding. Last check: )
The periodic table of the chemical elements, also called the Mendeleev periodic table, is a tabular display of the known chemical elements.
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.
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.
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 ipedia.com: Periodic table Article   (Site not responding. Last check: )
The periodic table of the chemical elements is a tabular display of the known chemical elements.
A group is a vertical column in the periodic table of the elements.
Mendeleev was later vindicated by the discovery of the electronic structure of the elements in the late 19th and early 20th century.
www.ipedia.com /periodic_table_1.html   (847 words)

  
 Periodic Table - MSN Encarta
Introduction; Arrangement of the Table; Uses of the Periodic Table; History
Elements, such as oxygen, iron, and gold, are the most basic chemical substances and cannot be broken down by chemical reactions.
A number of chemists contributed to the development of the periodic table during the 19th century; however, Mendeleyev is regarded as the primary discoverer.
encarta.msn.com /encyclopedia_761586387/Periodic_Table.html   (1197 words)

  
 The Periodic Table
The Periodic Table is the cornerstone of modern chemistry.
This classification is represented in the periodic table.
The best way to get to know how the Periodic Table works in practice is to examine in detail how the elements are fitted in, and how they naturally fall into groups.
www.physchem.co.za /Atomic/Periodic.htm   (479 words)

  
 (Almost) All the information you can get from the periodic table
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)

  
 CONK! Encyclopedia: D-block   (Site not responding. Last check: )
The d-block of the periodic table of the elements consists of those periodic table groups that contain elements in which, in the atomic ground state, the highest-energy electron is in a d-orbital.
Periods:  1  -  2  -  3  -  4  -  5  -  6  -  7  -  8  -  9
Blocks:  s-block  -  p-block  -  d-block  -  f-block  -  g-block
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 Periodic table   (Site not responding. Last check: )
A periodic table groupgroup is a vertical column in the periodic table of the elements.
Periodic table Explanation of the structure of the periodic table
Neutronic Periodic Table "''[http://www.theschemata.com The Schemata of the Elements]''" by Earth/matriX.
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 Periodic table - Wikipedia, the free encyclopedia   (Site not responding. Last check: )
Despite their similarities in mass (they differ by only a few atomic mass units), they have extremely different properties, as can be seen by looking at their allotropes: diatomic oxygen is a gas that supports burning, diatomic nitrogen is a gas that does not support burning, and carbon is a solid which can be burned.
This was followed by the English chemist 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.
Counterman, Craig, "Periodic Table of the Elements : For each of many properties a separate periodic table and a graph showing the relation with the atomic number (http://web.mit.edu/3.091/www/pt/)".
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 Periodic Table Of Elements
Periodic table is divided into seven horizontal rows of elements.
The groups of the periodic table are further divided into two sub-groups or families "A and B".
Arrangement of elements in the form of periodic table is very useful for the proper study of elements.
www.citycollegiate.com /periodictableIX.htm   (688 words)

  
 Periodic Table and Atomic Properties
Periodic Table - A tabular arrangement of elements in rows (periods) and columns (groups) in the order of their atomic numbers.
A period consists of the elements in any one horizontal row of the periodic table.
When the elements are arranged by atomic number in the periodic table, their physical and chemical properties vary periodically.
www.molecularsoft.com /data/help/Periodic_Table-Element_Properties.htm   (657 words)

  
 The Periodic Table of Elements | Chemistry | Periodic Chart | Science   (Site not responding. Last check: )
We've discussed chemistry and we've mentioned the Periodic Table of Elements but we didn't go into a lot of detail about the periodic chart.
Elements found in the same column of the Periodic Table (known as a group) have identical electron configurations (the locations of the electrons in an unexcited atom) and behave pretty much the same way chemically.
The atomic mass is a decimal number on the Periodic Table because it's an average of the various isotopes (one or more atoms that have the same atomic number but different mass numbers) of an element.
www.kidzworld.com /article/2065-what-is-the-periodic-table-of-elements   (505 words)

  
 [No title]   (Site not responding. Last check: )
At first glance the periodic table may just appear to be a table with all of the elements on it.
The best way for the reader to learn about the periodic table is to take a chemistry class, but hopefully this web page will give the reader a glimpse at the magnificent world of chemistry.
The elements on the far left of the table are the most reactive metals (called alkali metals, excluding hydrogen) and the elements on the 2nd, farthest right group are the most reactive nonmetals (called halogens).
library.thinkquest.org /12909/Periodic.html   (1211 words)

  
 Periodic table group   (Site not responding. Last check: )
A periodic table group is a vertical column in the periodic table of the elements.
The modern explanation of the pattern of periodic table is that the elements in group have similar configurations of the outermost electron shells of their atoms: as most chemical are dominated by outer electron interactions this to give elements in the same group physical and chemical properties.
There are three ways of numbering the of the periodic table one using Arabic numerals and the other two using Roman numerals.
www.freeglossary.com /Periodic_table_group   (413 words)

  
 periodic table on Encyclopedia.com   (Site not responding. Last check: )
In the periodic table the elements are arranged in columns and rows according to increasing atomic number (see the table entitled Periodic Table).
This is in keeping with current interpretations of the periodic law which holds that the elements in a group have similar configurations of the outermost electron shells of their atoms.
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 /html/p1/periodtbl.asp   (838 words)

  
 General Chemistry Online: Glossary: The periodic table
A region of the periodic table that corresponds to the type of subshell (s, p, d, or f) being filled during the Aufbau construction
As a consequence, sixth period transition metals are about the same size as their fifth period counterparts.
The periodic law states that physical and chemical properties of the elements recur in a regular way when the elements are arranged in order of increasing atomic number.
antoine.frostburg.edu /chem/senese/101/periodic/glossary.shtml   (597 words)

  
 Periodic Table
The periodic table is based on periodic law which states that the physical and chemical properties of elements are functions of their atomic numbers.
There are two more periods of transition elements located at the bottom of the periodic table.
Ionization energy increases as you go across a period because as you move across the periodic table you are adding more protons to the nucleus which exert more of a pull on the electrons.
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 Periodic Tables
The Multifunctional Table indexes the periodic properties of the elements.
Periodic Table of the Elements - Los Alamos National Laboratory: for each element, provides information related to the history, source, properties, and uses.
The site also provides links to: a periodic table that can be printed; the lyrics for "The Elements"; a history of the periodic table; general purpose periodic tables; WebElements and its mirror sites; periodic tables for kids; tables with a specific purpose; information about the periodic table; periodic table humor; and computer programs.
www.statweb.org /ACT2/periodic_tables.htm   (479 words)

  
 Periodic Table: Formulations
While the Janet periodic table is very logical and clear it does not separate metals from non-metals as well as the Mendeleev version, and helium is problem chemically.
However, the periodic table is usually exhibited in book and on posters in a compressed form with the f-block "rare earths" separated away from the s-block, p-block and d-block elements:
Unlike the Janet table, this table is assembled from bottom up in direction of increase of quantum number n, as well as atomic weight and energy.
www.meta-synthesis.com /webbook/35_pt/pt.html   (2494 words)

  
 History of the Periodic Table
Compiled a Periodic Table of 56 elements based on the periodicity of properties such as molar volume when arranged in order of atomic weight.
Mendeleev's Periodic Table was important because it enabled the properties of elements to be predicted by means of the 'periodic law': properties of the elements vary periodically with their atomic weights.
He modified the 'Periodic Law' to read that the properties of the elements vary periodically with their atomic numbers.
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 Electronic Configurations   (Site not responding. Last check: )
Each block in the table represents the addition of an electron to the previous block to get this new element.
As you work through the Periodic Table one electron at a time, you work up through the available orbitals in their proper order.
The Periodic Table can be divided into sections denoting the various kinds of subshells in order.
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 2. The Periodic Table
Here is a typical representation of the periodic table with the element symbols and the number of electrons in each atom.
In this empirical table, the elements are ordered by the number of electrons (or protons) in the atom and are grouped according to their chemical properties.
So the middle 10 columns of the periodic table are the d seats and, technically, the d seats in the 4th row are the 3d seats, the d seats in the 5th row are 4d seats and so on.
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