Answers to Concept Checks and The Language of Chemistry

(a) chemical property (b) physical property (c) chemical property 

solids carbon, sulfur, phosphorus, iodine, all metals except mercury liquids mercury and bromine gases hydrogen, oxygen, nitrogen, fluorine, chlorine (also neon, argon, krypton, xenon, radon) 

Elements potassium, hydrogen, phosphorus, oxygen 8 atoms 

(a) Yes. Although the total mass of Ag S may change, the percent mass of Ag in Ag S remains constant because the elements in a chenoical compound are always present in a definite proportion by mass. 

(a) Yes. Pure methane will have the same composition regardless of source because the percent mass of hydrogen and carbon in CH is constant. 

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Appendix E Answers to Concept Checks and The Language of Chemistry... 

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