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Periodic Table
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Chemistry: Four elements added to periodic table

Four chemical elements have been formally added to the periodic table, completing the scheme's seventh row.
They are the first to be included in the table since 2011, when elements 114 and 116 were added.
The new additions were formally verified by the International Union of Pure and Applied Chemistry (IUPAC) on 30 December 2015.
The body announced that a team of Russian and American researchers had provided sufficient evidence to claim the discovery of elements 115, 117 and 118.

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Newlands' Law of Octaves
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In 1863 John Newlands noticed that when ordered by weight, every eighth element seemed to share similar properties, such as carbon and silicon in the sequence: carbon, nitrogen, oxygen, fluorine, sodium, magnesium and silicon. He called this a Law of Octaves. 
Three years later, in 1866, he presented his ideas to the Chemical Society, unfortunately for Newlands, the musical analogy was not well received - the audience suggesting he might as well have ordered the elements alphabetically.

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RE: New Periodic Table
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The periodic table of elements just got a bit heftier today (Nov. 4), as the names of three new elements were approved by the General Assembly of the International Union of Pure and Applied Physics.
Elements 110, 111 and 112 have been named darmstadtium (Ds), roentgenium (Rg) and copernicium (Cn).

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Periodic Table
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On 6 March 1869, Dmitri Mendeleev made a formal presentation to the Russian Chemical Society, entitled The Dependence between the Properties of the Atomic Weights of the Elements, which described elements according to both atomic weight and valence.
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Atomic weight
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Chemists Revise Atomic Weights of 10 Elements

An international governing body has adopted a new definition of atomic mass (aka atomic weight) changing from specific values to intervals of masses to resolve 15 years of debate on one of the most fundamental of scientific concepts. In a list that only singer-comedian Tom Lehrer could love, hydrogen, lithium, boron, carbon, nitrogen, oxygen, silicon, sulphur, chlorine and thallium now all have new mass definitions.
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RE: New Periodic Table
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periodic6-1.gif

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RE: Periodic Table
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Title: An Alternate Graphical Representation of Periodic table of Chemical Elements
Authors: Mohd Abubakr

Periodic table of chemical elements symbolises an elegant graphical representation of symmetry at atomic level and provides an overview on arrangement of electrons. It started merely as tabular representation of chemical elements, later got strengthened with quantum mechanical description of atomic structure and recent studies have revealed that periodic table can be formulated using SO(4,2)* SU(2) group. IUPAC, the governing body in Chemistry, doesn't approve any periodic table as a standard periodic table. The only specific recommendation provided by IUPAC is that the periodic table should follow the 1 to 18 group numbering. In this technical paper, we describe a new graphical representation of periodic table, referred as 'Circular form of Periodic table'. The advantages of circular form of periodic table over other representations are discussed along with a brief discussion on history of periodic tables.

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Title: On a group-theoretical approach to the periodic table of chemical elements
Authors: Maurice Robert Kibler (IPNL)

This paper is concerned with the application of the group SO(4,2)xSU(2) to the periodic table of chemical elements. It is shown how the Madelung rule of the atomic shell model can be used for setting up a periodic table that can be further rationalized via the group SO(4,2)xSU(2) and some of its subgroups. Qualitative results are obtained from the table and the general lines of a programme for a quantitative approach to the properties of chemical elements are developed on the basis of the group SO(4,2)xSU(2).

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The chemical elements are being brought to life online in a series of YouTube videos filmed at a UK university.
The project by a team in Nottingham is designed to stimulate interest in chemistry and comprises videos illustrating each of the 118 elements.

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www.periodicvideos.com/

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