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CSU - CHEM 111 - Chemistry 111 - Class Notes

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CSU - CHEM 111 - Chemistry 111 - Class Notes

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background image 3.10 The Sizes of Atoms (in pm)
background image Shielding • In a many-electron atom,  electrons are both attracted to 
the nucleus and repelled by 
other electrons.
• The cancelling of the nuclear  attractive force on an electron 
due to the electron-electron 
repulsion is called 
shielding .
background image Core electrons are the most  effective at shielding.
background image The  effective nuclear charge Z eff , is the net attraction  of an electron to a nucleus after screening. Z eff ≈ Z – core electrons • Z eff increases from left to right across a row in the  periodic table. • Z eff increases slightly as you move down a column. Effective Nuclear Charge

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School: Colorado State University
Department: Chemistry
Course: General Chemistry I
Professor: Ruth Tucker
Term: Summer 2016
Tags: Chemistry
Name: Chemistry 111
Description: These are the lecture notes- But this will give you the link to look for study guides to help pass the exams!
Uploaded: 02/24/2016
14 Pages 13 Views 10 Unlocks
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