Name:  __________________________
		WS #7 qt1 pkt3
	1-3 What Is Matter Of? Concept Review Atoms and elements Write the name of the element for each chemical symbol listed below. 1. C ____________________            4. Au____________________               2. N_____________________           5. Hg____________________          3. S_____________________            6. Sn____________________ Write the chemical symbol for each element listed below. 7. Silver_________          9. Potassium__________       11. Sodium_________ 8. Lead__________        10. Iron ___________               12. Copper_________ Answer the follwing items in the space provided. 13. How dose an element differ from an element?        ____________________________________________________________       _____________________________________________________________ 14. How dose an atom differ from a molecule?        _____________________________________________________________        ____________________________________________________________ 15. What is an allotrope?        _____________________________________________________________        ____________________________________________________________ 16. When is a sample of matter considered a pure substance?         ____________________________________________________________         ____________________________________________________________ 17. Which elements are most common in the Earth's crust?         ____________________________________________________________        ____________________________________________________________ 18. Living things are primarily composed of which four elements?        _____________________________________________________________          ____________________________________________________________ 1-4 How is Matter               Classified? Concept Review Classifying matter Answer the following item in the space provided. 1. Briefly explain why a beaker containing sand and water is a mixture although sand itself is a pure substance.      ______________________________________________________________      ______________________________________________________________       ______________________________________________________________       ______________________________________________________________ Indicate in column A below whether each material is a pure substance, heterogeneous mixture.  I n colum B, indicate whether each substance is organic or in organic.                                                      COMLUMN A                           COLUMN B 2. C2H2                                 __________________         ___________________ 3. Au                                      __________________         ___________________ 4. Hg                                      _________________            ___________________ 5. CH3COOH                         _________________            ___________________ 6. carbonated beverage     _________________            __________________ 7. raisin bran cereal            __________________         ___________________ 8.sainless steel                    _________________           ___________________ Circle the letter of the choice that best answers the qusetion. 9. Which property shows that a solution is a base?       a.ph=4.5             c.reacts with metals       b.sour taste      d. turns pH paper blue 10. Which of the following has a net chemical charge?       a.atom                c.ion       b.element          d.molecule