1. Counting Atoms Worksheet

2. NaCl – Na = 1 – Cl = 1 BaCl 2 – Ba = 1 – Cl = 2 BaSO 4 – Ba = 1 – S = 1 – O = 4 CaSO 4 – Ca = 1 – S = 1 – O = 4 K 2 Cr 2 O 7 – K = 2 – Cr = 2 – O = 7

3. C 6 H 4 Cl 2 – C = 6 – H = 4 – Cl = 2 C 2 H 4 O 2 – C = 2 – H = 4 – O = 2 CH 3 OH – C = 1 – H = 4 – O = 1 Mg (OH) 2 – Mg = 1 – O = 2 – H = 2 C 7 H 5 (NO 2 ) 3 – C = 7 – H = 5 – N = 3 – O = 6 Ca (H 2 PO 4 ) 2 – Ca = 1 – H = 4 – P = 2 – O = 8

4. (CH 3 ) 2 CO – C = 3 – H = 6 – O = 1 2HBr – H = 2 – Br = 2 2CHC 3 OOH – C = 8 – H = 4 – O = 4 6C 6 H 4 BrOH – C = 36 – H = 30 – Br = 6 – O = 6

5. E, C, M, Worksheet 1. Element – Any substance that contains only one kind of atom – Cannot be broken down 2. Compound – Consists of atoms of two or more different elements – Can be broken down 3. Mixture – Consists of two or more different elements/compounds – Can be separated

6. E, C, M, Worksheet 4. Homogeneous – Evenly mixed/distributed Hetergeneous – Not evenly mixed

7. E, C, M, Worksheet 6. Element 7. Compound 8. Homogeneous Mixture 9. Heterogeneous Mixture 10. Homogeneous Mixture 11. Compound

8. E, C, M, Worksheet 12. Homogeneous / Heterogeneous Mixture 13. Heterogeneous Mixture 14. Element 15. Compound 16. Compound 17. Element 18. Homogeneous Mixture

9. E, C, M, Worksheet 19. Heterogeneous Mixture 20. Homogeneous Mixture 21. Heterogeneous Mixture 22. Homogeneous/Heterogeneous Mixture 23. Element 24. Heterogeneous Mixture 25. Heterogeneous Mixture 26. Element

10. E, C, M, Worksheet 27. Compound 28. Homogeneous Mixture 29. Heterogeneous Mixture