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Williamsburg High School for Architecture and Design

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You are here: Home / Teacher Posts / Periodic Trends, Part 3

Periodic Trends, Part 3

October 30, 2013 By Ms. Bui

Today we dug deep into the causes of trends in electronegativity and atomic radius across periods.  We concluded:

  • As we go from left to right, the nuclei get larger and can pull harder
  • As we go from left to right, the electrons do not get any farther away from the nucleus
  • Having more electrons does not change the pull per electron

So at the right of the periodic table, electrons are pulled in tighter, which increases the electronegativity and decreases the atomic radius.

Aim: How can we explain trends in atomic radius and electronegativity across periods?

Presentation: 

Download (PPTX, 1.32MB)

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Ms. Bui

About Ms. Bui

Welcome!. My name is Ms. Bui and I teach Chemistry. I can be reached at bui@whsad.org.
Materials and assignments can be found at www.coursesites.com
Grades can be found at www.skedula.com

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