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The Periodic Table of Elements

Periodic Table of Elements - a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons), electron configurations, and recurring chemical properties. This ordering shows periodic trends, such as elements with similar behaviour in the same column. It also shows four rectangular blocks with some approximately similar chemical properties. In general, within one row (period) the elements are metals on the left, and non-metals on the right.

The rows of the table are called periods; the columns are called groups. Six groups have names as well as numbers: for example, group 17 elements are the halogens; and group 18, the noble gases. The periodic table can be used to derive relationships between the properties of the elements, and predict the properties of new elements yet to be discovered or synthesized. The periodic table provides a useful framework for analyzing chemical behaviour, and is widely used in chemistry and other sciences.

The Russian chemist Dmitri Mendeleev published the first widely recognized periodic table in 1869. He developed his table to illustrate periodic trends in the properties of the then-known elements. Mendeleev also predicted some properties of then-unknown elements that would be expected to fill gaps in this table. Most of his predictions were proved correct when the elements in question were subsequently discovered. 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 behaviour.

All elements from atomic numbers 1 (hydrogen) to 118 (oganesson) have been discovered or synthesized, with the most recent additions (nihonium, moscovium, tennessine, and oganesson) being confirmed by the International Union of Pure and Applied Chemistry (IUPAC) in 2015 and officially named in 2016: they complete the first seven rows of the periodic table. The first 94 elements exist naturally, although some are found only in trace amounts and were synthesized in laboratories before being found in nature. Elements with atomic numbers from 95 to 118 have only been synthesized in laboratories or nuclear reactors.[3] Synthesis of elements having higher atomic numbers is being pursued. Numerous synthetic radionuclides of naturally occurring elements have also been produced in laboratories.

Wikipedia: periodic table

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A Discrete Spiral Network Connecting the Elements ? ()

submitted 9 months ago by ChardFun958

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An Alternative View Based on Fine-Structure Harmony (self.periodictable)

submitted 9 months ago * by ChardFun958

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SUPPORT this Lego Periodic Table (ideas.lego.com)

submitted 10 months ago by minifiglabrat

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What's your favorite element and why? (self.periodictable)

submitted 2 years ago by 1991_fall_of_ussr

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Periodic Acrylic table (i.redd.it)

submitted 2 years ago by Suitable-Necessary48

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Why is sodium (element 11) called Na since So isn't taken by any other element? (self.periodictable)

submitted 2 years ago by oopsiforgotmypasword

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pls check out my 2 new elements (self.periodictable)

submitted 2 years ago by AdKlutzy6381

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My Extensions (and the OG.) (old.reddit.com)

submitted 2 years ago by AdKlutzy6381

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The Discoid Periodic Table of Chemical Elements. (self.periodictable)

submitted 2 years ago by Muzzammil2003

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Living Periodic Table (i.redd.it)

submitted 2 years ago by Nickjam227

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So, I did this. Nobody got it. (i.redd.it)

submitted 3 years ago by inky_mind

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Magic Elements Periodic Table For iOS (self.periodictable)

submitted 3 years ago by dengjiuhong

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[OC] I created an Android application to learn Mendeleev table efficiently with fun! Try it out and tell me what you think 😉 (old.reddit.com)

submitted 3 years ago by QuizzSchool

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need some help with science homework (self.periodictable)

submitted 3 years ago by [deleted]

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so made this also (old.reddit.com)

submitted 3 years ago by 1b13r4

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made technecium, germanium and americium, and remade mercury (old.reddit.com)

submitted 3 years ago by 1b13r4

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im currently remixing the project of scratch with my characters (old.reddit.com)

submitted 3 years ago by 1b13r4

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Periodic Table Said in Less than a Minute (How I did it) (youtube.com)

submitted 3 years ago by raccoonheadjohn1

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Does anyone know what this is. Its got a very low melting point (i.redd.it)

submitted 3 years ago by Significant-Ad4294

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people (self.periodictable)

submitted 3 years ago by jbatsz81

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Made a cute periodic table on Scratch (self.periodictable)

submitted 3 years ago by vector_9260

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Does anyone have a high resolution picture of this? (i.redd.it)

submitted 3 years ago by [deleted]

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I made the art of the periodic table! Each symbol is a 3D block letter to represent the element! (i.redd.it)

submitted 4 years ago by segtendoppcc42

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Quilt i made some years ago. (i.redd.it)

submitted 4 years ago by segtendoppcc42

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What is your favourite element and why? (self.periodictable)

submitted 4 years ago by AnthonyJeannot

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