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chemical elements by classification

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

7 N   Nitrogen  
What is the boiling point of Nitrogen?   -320.44 F  
How is nitrogen obtained?   liquid air  
Who discovered Nitrogen?   Daniel Rutherford in 1772  
Nitrogen comes from the greek word for what?   to choke  
nitrogen forms about how much of the atmosphere?   78%  
15 P   Phosphorus  


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Created by: Lailasmom