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Facts

  Fact Category Datev  
196 The symbol for the chemical element chromium is Cr. Science > Chemistry 06/03/08
197 Ni is the symbol for the chemical element nickel. Science > Chemistry 06/03/08
198 The symbol for the chemical element calcium is Ca. Science > Chemistry 06/03/08
199 The symbol for the chemical element iron is Fe. Science > Chemistry 06/02/08
200 O is the symbol for the chemical element oxygen. Science > Chemistry 06/02/08
201 Joseph Priestly is most commonly credited for the discovery of the element oxygen. Science > Chemistry 05/26/08
202 The atomic mass of hydrogen is 1.0079. Science > Chemistry 05/21/08
203 Nitrogen has 5 valence electrons. Science > Chemistry 05/20/08
204 Boron has 3 valence electrons. Science > Chemistry 05/20/08
205 Carbon has 4 valence electrons. Science > Chemistry 05/20/08
206 Beryllium has 2 valence electrons. Science > Chemistry 05/20/08
207 Hydrogen has 1 valence electron(s). Science > Chemistry 05/20/08
208 Sodium has 1 valence electron. Science > Chemistry 05/19/08
209 Lithium has 1 valence electron(s). Science > Chemistry 05/19/08
210 An oxygen atom has 6 valence electrons. Science > Chemistry 05/19/08

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