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Classifying Matter: Elements, Compounds, and Mixtures

Learn about the different types of matter and how they can be classified as elements, compounds, or mixtures. Discover the properties and examples of each category, as well as the methods of separating mixtures.

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Classifying Matter: Elements, Compounds, and Mixtures

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  1. Classifying Matter:Elements, Compounds, and Mixtures Adapted from Liz LaRosa 5th Grade Science www.middleschoolscience.com 2009

  2. Matter • Matter • is the material that makes up a substance • makes up the things we see everyday, such as water, wood, cooking pans, clothes, and shoes 2

  3. Pure Substances • A sample of matter that has definite chemical and physical properties.

  4. Elements • Elementsare • pure substances that contain atoms of only one type Examples: Copper (Cu) Lead (Pb) Aluminum (Al) 4

  5. Compounds • Compounds • contain two or more elements in a definite ratio • Made of elements in a specific ratio that is always the same • Has a chemical formula Examples: Salt (NaCl) Table sugar (C12H22O11) Water (H2O) 5

  6. Elements in a Compound • “Table salt” is a compound that contains the elements sodium and chlorine. 6

  7. Mixtures • A combination of two or more pure substances that are not chemically combined. • substances held together by physical forces, not chemical • No chemical change takes place • Each item retains its properties in the mixture • They can be separated physically Chem4kids.com

  8. Physical Separation of A Mixture • The physical separation of a mixture • involves only physical changes • occurs when pasta and water are separated with a strainer 8

  9. Homogeneous Mixtures • In a homogeneous mixture, • the composition is uniform throughout • the different parts of the mixture are not visible 9

  10. Heterogeneous Mixtures • In a heterogeneous mixture, • the composition is not uniform; it varies from one part of the mixture to another • the different parts of the mixture are visible 10

  11. Element, Compound, or Mixture?

  12. Classification of Matter 13

  13. Mixtures vs. Compounds http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/elements_com_mix_6.shtml

  14. Can you identify the following? You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture. Review: • An element contains just one type of atom. • A compound contains two or more different atoms joined together. • A mixture contains two or more different substances that are only physically joined together, not chemically. • A mixture can contain both elements and compounds.

  15. Element, Compound, or Mixture? Rocks

  16. Element, Compound, or Mixture? Rocks

  17. Element, Compound, or Mixture? Copper

  18. Element, Compound, or Mixture? Copper

  19. Element, Compound, or Mixture? Soup

  20. Element, Compound, or Mixture? Soup Heterogeneous

  21. Element, Compound, or Mixture? Table Sugar

  22. Element, Compound, or Mixture? Table Sugar

  23. Element, Compound, or Mixture? Diamond

  24. Element, Compound, or Mixture? Diamond

  25. Element, Compound, or Mixture? Tea

  26. Element, Compound, or Mixture? Tea Homogeneous

  27. Element, Compound, or Mixture? Salt

  28. Element, Compound, or Mixture? Salt

  29. Element, Compound, or Mixture? Neon Gas

  30. Element, Compound, or Mixture? Neon Gas

  31. Element, Compound, or Mixture? Salad

  32. Element, Compound, or Mixture? Salad Heterogeneous

  33. Element, Compound, or Mixture? Pure Water

  34. Element, Compound, or Mixture? Pure Water

  35. Element, Compound, or Mixture? Aluminum

  36. Element, Compound, or Mixture? Aluminum

  37. Element, Compound, or Mixture? Lemonade Homogeneous

  38. Element, Compound, or Mixture? Lemonade

  39. Element, Compound, or Mixture? Silver

  40. Element, Compound, or Mixture? Silver

  41. Element, Compound, or Mixture? Trail Mix

  42. Element, Compound, or Mixture? Trail Mix Heterogeneous

  43. Notes • Detailed notes are located at: http://www.middleschoolscience.com/elements-compounds-mixtures-notes-isn.pdf • Flow Chart: http://www.middleschoolscience.com/matter-flow-chart-isn.pdf

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