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The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties. The rows of the table are called periods; the columns are called groups, with some of these having names such as halogens or noble gases. All elements from atomic numbers 1 (hydrogen) to 118 (ununoctium) have been discovered or reportedly synthesized, with elements 113, 115, 117 and 118 having yet to be confirmed. With thanks to the University of Nottingham for their excellent youtube videos and Loretta Steyn for the marvellous graphic table above. You should assume that the owner of this website is an affiliate for providers of goods and services mentioned on this website and may be compensated when you purchase from a provider. Economic Collapse Investing: How to Secure Lasting Wealth from the Final Financial Blowout for $0.17 per Day!
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Copyright © 2016 The Economic Collapse - May all of you be blessed with good work, health and peace - If you came here looking for hope, you just found it. Elements are presented in order of increasing atomic number (the number of protons in the nucleus). Since, by definition, a periodic table incorporates recurring trends, any such table can be used to derive relationships between the properties of the elements and predict the properties of new, yet to be discovered or synthesized, elements. He developed his table to illustrate periodic trends in the properties of the then-known elements. The first 98 elements exist naturally although some are found only in trace amounts and were initially discovered by synthesis in laboratories.
The standard form of the table consists of a grid of elements laid out in 18 columns and 7 rows, with a double row of elements below that.
As a result, a periodic table—whether in the standard form or some other variant—provides a useful framework for analyzing chemical behavior, and such tables are widely used in chemistry and other sciences. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table.

Elements with atomic numbers from 99 to 118 have only been synthesized, or claimed to be so, in laboratories. The table can also be deconstructed into four rectangular blocks: the s-block to the left, the p-block to the right, the d-block in the middle, and the f-block below that. Most of his predictions were proved correct when the elements in question were subsequently discovered. Production of elements having higher atomic numbers is being pursued, with the question of how the periodic table may need to be modified to accommodate any such additions being a matter of ongoing debate. If generating additional income from home each month would help you out, here's the place to start! Mendeleev’s periodic table has since been expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behavior.

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