Online Introductory Chemistry

Atoms & the Periodic Table
Dr. Walt Volland revised July 5, 2010 all rights reserved 2005-2010

schematic of a helium-4 Bohr atom model:

2 protons, 2 neutrons and 2 electrons

Suggested exercises

7 Characteristic Properties of Groups of Elements

8 Electron Configurations & the Periodic Table

9 Self test

10 Self test answers

WebElements is a comprehensive periodic table site created by Mark Winter.

Click here to access a periodic table supported by Los Alamos National Laboratory

revised by Dr. Walt Volland July 5, 2010 all rights reserved 2005-2009