Follow though the websites below in order to answer questions on your worksheet 

 

1)  http://www.chemtutor.com/struct.htm

     Read the "And you thought you were strange" section

 

 2)  http://galileo.phys.virginia.edu/classes/252/atoms.html

 

3)  http://www.iun.edu/~cpanhd/C101webnotes/composition/dalton.html

 

4)  https://www.chemheritage.org/historical-profile/joseph-john-j-j-thomson

 

5)  http://www.pbs.org/wgbh/aso/databank/entries/dp13at.html

 

6)  http://www.pbs.org/wgbh/aso/databank/entries/dp32ne.html

 

7)  https://www.timetoast.com/timelines/77868