1. Mixtures and Pure Substances

3. Pure Substance Pure Substance: a substance that contains only one type of material –Element- substance that contains only one type of atom. It is the simplest form of matter that has a unique set of properties –Compound- a substance that contains two or more elements chemically combined in a fixed proportion Compounds can be broken down into simpler substances by chemical means, but elements can not

4. Sodium Na Chlorine Cl 2 Sodium Chloride (salt) NaCl Element Compound + =

5. Mixtures Mixture: matter that contains two or more different materials –Heterogeneous Mixture- a mixture in which the composition is not uniform throughout –Homogeneous Mixture(solution)- a mixture in which the composition is uniform throughout Solute- substance being dissolved Solvent- substance doing the dissolving –A solution can be in the solid, liquid or gas phase

6. What would you consider this?

8. And this?

9. Extensive vs. Intensive Properties Extensive Property –A property that depends on the amount of matter present Intensive Property- a property that DOES NOT depend on the amount of matter present

10. Intensive vs. Extensive Properties Intensive Property: a property that does NOT depend on the amount of matter present Extensive Property: a property that depends on the amount of matter present

11. Mass

12. PhysicalExtensive

13. Conductivity

14. PhysicalIntensive

15. Flammability

16. ChemicalIntensive

17. Color

18. PhysicalIntensive

19. Density

20. PhysicalIntensive

21. Heat produced

22. ChemicalExtensive

23. Volume

24. PhysicalExtensive

25. Melting Point

26. PhysicalIntensive

27. Boiling Point

28. PhysicalIntensive

29. Length

30. PhysicalExtensive

31. Examples Physical: Mass Conductivity Color Density Volume Melting Point Boiling Point Length Chemical Flammability Heat Produced