Counting Atoms Worksheet

• NaCl–Na = 1–Cl = 1

• BaCl2

–Ba = 1–Cl = 2

• BaSO4

–Ba = 1– S = 1–O = 4

• CaSO4

–Ca = 1– S = 1–O = 4

• K2Cr2O7

–K = 2–Cr = 2–O = 7

• C6H4Cl2

– C = 6–H = 4– Cl = 2

• C2H4O2

– C = 2–H = 4–O = 2

• CH3OH– C = 1–H = 4–O = 1

• Mg (OH)2

–Mg = 1–O = 2–H = 2

• C7H5(NO2)3

– C = 7–H = 5–N = 3–O = 6

• Ca (H2PO4)2

– Ca = 1–H = 4– P = 2–O = 8

• (CH3)2CO–C = 3–H = 6–O = 1

• 2HBr–H = 2–Br = 2

• 2CHC3OOH–C = 8–H = 4–O = 4

• 6C6H4BrOH–C = 36–H = 30–Br = 6–O = 6

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

E, C, M, Worksheet

4. Homogeneous – Evenly mixed/distributed Hetergeneous – Not evenly mixed

E, C, M, Worksheet

6. Element7. Compound8. Homogeneous Mixture9. Heterogeneous Mixture10. Homogeneous Mixture11. Compound

E, C, M, Worksheet

12. Homogeneous / Heterogeneous Mixture13. Heterogeneous Mixture14. Element15. Compound16. Compound17. Element18. Homogeneous Mixture

E, C, M, Worksheet

19. Heterogeneous Mixture20. Homogeneous Mixture21. Heterogeneous Mixture22. Homogeneous/Heterogeneous Mixture23. Element24. Heterogeneous Mixture25. Heterogeneous Mixture26. Element

E, C, M, Worksheet

27. Compound28. Homogeneous Mixture29. Heterogeneous Mixture