MadSci Network: Chemistry

Subject: Why are there inconsistancies in electron configuration patterns?

Date: Wed Apr 5 00:24:30 2000
Posted by Ed Yeager
Grade level: nonaligned School: none
City: Sunbury State/Province: Pa Country: USA
Area of science: Chemistry
ID: 954912270.Ch

In the periodic table, showing electon configurations, the transitional elements 
and rare earths, show an inconsistant increase in the number of electrons in the 
orbitals.  For example, AU-Gold has an electron configuration of  2-8-18-32-18-1 
instead of 2-8-18-32-17-2.  The 79th electron falls to the preceding transitional 
shell instead of remaining in the outter most represntative 6s orbital.  HG-
Mercury for example has both of its 6s electrons.  There are several other 
elements.  Some that give up two of their electrons to a preceding shell before 
eventually coming back to a "counting up" pattern.  What causes these "certain 
elements" to temporarily jump out of step, in the increasing progression of the 
tables electron configurations?  

Re: Why are there inconsistancies in electron configuration patterns?

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