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Classifying Matter: Elements, Compounds, and Mixtures

Classifying Matter: Elements, Compounds, and Mixtures.

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Classifying Matter: Elements, Compounds, and Mixtures

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  1. Classifying Matter:Elements, Compounds, and Mixtures

  2. All matter has certain characteristics in common that separate it from whatever is not matter. Can you tell which is which? Work with a partner at your table. You will be given a set of cards. Each card has 6 items on it.Try and classify all the items in the chart. What characteristics does the matter have that the not matter does not?

  3. Does it Matter or NOT

  4. What is Matter • Matter is anything that has mass and takes up space • Matter is made up of atoms. An atom is the smallest unit of matter • Atoms can combine or bond to form a molecule

  5. Pure Substances • A sample of matter that has definite chemical and physical properties. Atoms Elements Compounds Molecules

  6. Elements • pure substance that cannot be separated into simpler substance by physical or chemical means.

  7. Compounds Pure substance composed of two or more different elements joined by chemical bonds. • Made of elements in a specific ratio that is always the same • Has a chemical formula • Can only be separated by chemical means, not physically H2O NaCl CO2

  8. 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

  9. 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.

  10. Directions • You will be shown a series of pictures. Write the name of the item in the correct column, Element, Compound or Mixture • If it is a mixture, put an He if you think it is heterogeneous and an Ho if it is homogeneous

  11. Element, Compound, or Mixture? Rocks

  12. Element, Compound, or Mixture? Rocks

  13. Element, Compound, or Mixture? Copper

  14. Element, Compound, or Mixture? Copper Cu

  15. Element, Compound, or Mixture? Jelly Beans

  16. Element, Compound, or Mixture? Jelly Beans

  17. Element, Compound, or Mixture? Table Sugar

  18. Element, Compound, or Mixture? Table Sugar C12H22O11

  19. Element, Compound, or Mixture? Diamond

  20. Element, Compound, or Mixture? Diamond C

  21. Element, Compound, or Mixture? Tea

  22. Element, Compound, or Mixture? Tea

  23. Element, Compound, or Mixture? Salt

  24. Element, Compound, or Mixture? NaCl Salt

  25. Element, Compound, or Mixture? Neon Gas

  26. Element, Compound, or Mixture? Ne Neon Gas

  27. Element, Compound, or Mixture? Salad

  28. Element, Compound, or Mixture? Salad

  29. Element, Compound, or Mixture? Pure Water

  30. Element, Compound, or Mixture? Pure Water H2O

  31. Element, Compound, or Mixture? Aluminum

  32. Element, Compound, or Mixture? Aluminum Al

  33. Element, Compound, or Mixture? Lemonade

  34. Element, Compound, or Mixture? Lemonade

  35. Element, Compound, or Mixture? Silver

  36. Element, Compound, or Mixture? Silver Ag

  37. Element, Compound, or Mixture? Sand

  38. Element, Compound, or Mixture? Sand

  39. Types of Mixtures • Two main categories • Homogeneous – molecules are mixed up in an even distribution • Heterogeneous – molecules are not mixed up in an even distribution

  40. Homogeneous Mixtures • Solutions- a well mixed mixture—appears to be a single substance • Solute - the substance being dissolved • Solvent – the substance in which the solute is being dissolved • water is considered a universal solvent • Particles do not scatter light • Ex:coffee, lemonade, Kool-Aid

  41. Homogeneous Mixtures • Colloids- a mixture of tiny particles that are bigger than those in a solution, but smaller than in a suspension • Do not settle out over time • Scatter light • Ex. Mayonnaise, milk, gelatin, whipped cream

  42. Heterogeneous Mixtures • Suspensions – a mixture in which particles are dispersed in liquid or a gas and will eventually settle out • Particles can scatter light • Can be filtered out using a filter • Ex. Snow globe, sand in a bucket of water, muddy water, Italian salad dressing

  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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