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Periodic table - Standard periodic table | A Wisdom Archive on Periodic table - Standard periodic table | | Periodic table - Standard periodic table A selection of articles related to Periodic table - Standard periodic table | |
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Periodic table, Periodic table - Further resources, Periodic table - Groups, Periodic table - History, Periodic table - Methods for displaying the periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - Periodicity of chemical properties, Periodic table - Standard periodic table, Atomic electron configuration table, Isotope table (complete), Isotope table (divided), Discoveries of the chemical elements, Abundance of the chemical elements, Tom Lehrer's song <i>The Elements</i>, IUPAC's systematic element names, Cosmochemical Periodic Table of the Elements in the Solar System, Table of chemical elements
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ARTICLES RELATED TO Periodic table - Standard periodic table | | | |  Periodic table - Standard periodic table: Encyclopedia II - Periodic table - GroupsA group, also known as a family, is a vertical column in the periodic table of the elements. There are 18 groups or families in the standard periodic table. Elements in a group have similar configurations of their valence shell electrons, which gives them similar properties.
There are three systems of group numbers; one using Hindu-Arabic numerals (1, 2, ... 18), another using Roman numerals (I, II, ... VIII), and one using a combination of Roman numerals and Latin letters (IA, IIA, IB, ... VIIIA). The Roman numeral names are the orig ...
See also:Periodic table, Periodic table - Groups, Periodic table - Periodicity of chemical properties, Periodic table - Methods for displaying the periodic table, Periodic table - Standard periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - History, Periodic table - Further resources Read more here: » Periodic table: Encyclopedia II - Periodic table - Groups |
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| | | | Periodic table - Standard periodic table: Encyclopedia II - Periodic table - History 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. The first to recognize these regularities was the German chemist Johann Wolfgang Döbereiner who, in 1829, noticed a number of triads of similar elements:
This was followed by the English chemist John Newlands, who noticed in 1865 that the elements o ...
See also:Periodic table, Periodic table - Groups, Periodic table - Periodicity of chemical properties, Periodic table - Methods for displaying the periodic table, Periodic table - Standard periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - History, Periodic table - Further resources Read more here: » Periodic table: Encyclopedia II - Periodic table - History |
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| | | | Periodic table - Standard periodic table: Encyclopedia II - Periodic table - Methods for displaying the periodic table
Periodic table - Standard periodic table.
1Actinides and lanthanides are collectively known as "Rare Earth Metals".
2Alkali metals, alkaline earth metals, transition metals, actinides, lanthanides, and poor metals are all collectively known as "Metals".
3Halogens and noble gases are also non-metals.
State at standard temperature and pressure
those with atomic number in red are gases
those with ...
See also:Periodic table, Periodic table - Groups, Periodic table - Periodicity of chemical properties, Periodic table - Methods for displaying the periodic table, Periodic table - Standard periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - History, Periodic table - Further resources Read more here: » Periodic table: Encyclopedia II - Periodic table - Methods for displaying the periodic table |
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| | | | Periodic table - Standard periodic table: Encyclopedia II - Periodic table - Periodicity of chemical properties Elements adjacent to one another within a group have similar physical properties, despite their significant differences in mass. Elements adjacent to one another within a period, or energy level, have similar mass but different properties.
For example, very near to nitrogen (N) in the second period of the chart are carbon (C) and oxygen (O). Despite their similarities in mass (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 d ...
See also:Periodic table, Periodic table - Groups, Periodic table - Periodicity of chemical properties, Periodic table - Methods for displaying the periodic table, Periodic table - Standard periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - History, Periodic table - Further resources Read more here: » Periodic table: Encyclopedia II - Periodic table - Periodicity of chemical properties |
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| | | | Periodic table - Standard periodic table: Encyclopedia II - Periodic table - Periodic table structure reflects electron configuration The primary determinant of an element's chemical properties is its electron configuration, particularly the valence shell electrons. For instance, all atoms whose four valence electrons are found on the p shell will behave similarly, regardless of which energy level that last p shell is on. The shell in which the atom's outermost electrons reside determines the "block" to which it belongs. Th ...
See also:Periodic table, Periodic table - Groups, Periodic table - Periodicity of chemical properties, Periodic table - Methods for displaying the periodic table, Periodic table - Standard periodic table, Periodic table - Other depictions, Periodic table - Periodic table structure reflects electron configuration, Periodic table - History, Periodic table - Further resources Read more here: » Periodic table: Encyclopedia II - Periodic table - Periodic table structure reflects electron configuration |
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