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The INTERNET Database of Periodic Tables

There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D.

Use the drop menus below to search & select from the more than 1100 Period Tables in the database:

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2019

Colburn's 2019 Periodic Table of The Elements

Justin Lee Colburn writes:

"What is unique to my Periodic Table is the fact that any Elements Electron Spin can be identified for Orbital Diagrams using a technique I have called 'Element Shifting'.

"Elements with an Up spin Valence Electron are shifted up and Elements with a down spin are shifted down. Also, the Hund's rule Exceptions are Highlighted in the Transition Metals so their orbital diagrams can also be identified easily.

"In addition, an accurate numbering system can be applied to all the elements with Helium placed in Group 2 instead of Group 18. I believe that quantitative data should take priority when giving elements their position, but this system is meant to be dynamic rather than static. In my Periodic Table System, (1-8) corresponds to Valence Electrons in the s and p orbitals and then the 9-18 and 19-32 corresponds to core electron in d and f orbitals .

I believe that it is important to begin by showing students the first 20 Elements FIRST because they all add Outer Valence Electrons which makes the Periodic Table logic easy to follow. Also explaining that Hydrogen and Helium are anomalies with more than one logical position, can really help clear up confusion for new students.

"After element 20, the Transition Elements such as scandium 21 begin adding core electrons in the d orbital the current standard (1-18) numbering system does not reflect this. One of the reasons why I prefer keeping the s and p block elements on the outside of the table and the f and d block elements on the inside is because of how they add electrons to their orbitals.

"I have been developing a curriculum based on this system that I believe will help students learn and understand the logic and trends of The Periodic Table more efficiently than the standard. Rather than memorizing Element information, Students will truly be able to follow the logic based on the location of the Elements, simple counting and using the numbering system."

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What is the Periodic Table Showing? Periodicity

© Mark R. Leach Ph.D. 1999 –


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