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Classifying Matter

Classifying Matter. 8/26. Mixture vs. Pure Substance. Pure Substances. Pure Substances. Pure Substance- Constant and uniform throughout (atom or molecule)  1 type of something Atom Molecule Atom - Single element (Cannot be broken into smaller parts) Elements (ex. Au, H, Ne)

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Classifying Matter

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  1. Classifying Matter 8/26

  2. Mixture vs. Pure Substance

  3. Pure Substances

  4. Pure Substances • Pure Substance- Constant and uniform throughout (atom or molecule)  1 type of something Atom Molecule • Atom- Single element (Cannot be broken into smaller parts) • Elements (ex. Au, H, Ne) • Where can you find a list of elements? • HOFBrINCl • Molecule- 2 or more atoms put together

  5. + Molecules/Compounds • Compound- more than one type of element in a molecule (ex. NaCl) • Can be separated into elements • The properties of compounds can be much different than the properties of just the elements • For example : NaCl

  6. + • These elements combine with each other during a chemical reaction • They combine in a fixed proportion (Law of Definite Proportion)-they bind the same way every time! • Examples – NaCl, H2O, Fe(NO3)3

  7. Fun Fact Today, there are approximately 10 million known compounds, and new compounds continue to be developed and discovered at the rate of about 100 000 per year. There appears to be no limit to the number of compounds that can be made or that will be discovered.

  8. Which are elements and which are compounds?

  9. Allotrope • Allotrope-forms of an element in the same physical state but have different structures • Example: Diamonds and Graphite (forms of Solid Carbon)

  10. Mixtures

  11. Mixtures • Mixture- A blend or combination of two or more pure substances • Not chemically combined!!!!! • Variable compositions (not uniform and unchanging) • Granite -Candy

  12. Heterogeneous Mixture • heterogeneous mixture– you can actually see a difference / does not blend smoothly throughout • Examples: Sand & Water, Salt & Pepper, a bag of M&Ms

  13. Homogeneous Mixture • homogeneous mixture - you cannot see a difference; it always has a single phase • Examples: Salt water: H2O + NaCl Air: N2 + O2 + CO2 • Mixture with no visibly different parts

  14. Solution A homogeneous mixture is also known as a solution!

  15. Alloy • Alloy- a homogeneous mixture of metals or a mixture of a metal and a nonmetal in which the metal substance is the major component • Examples: Steel, Brass

  16. Classify Draw a picture, similar to the pictures above, that represents a compound • Mixtures • Homogeneous • Heterogeneous • pure substances • elements • compounds

  17. Practice • http://www.teacherbridge.org/public/bhs/teachers/Dana/Matter.html

  18. Create a Matter Concept Map • Work with your partner to create your very own concept map. (Bubble map) • Be Creative • Use Color • Use Pictures

  19. In this activity you will create a concept map that diagrams the relationships among the following ideas: • Air Water • Carbon Solution • Chocolate chip cookie Soil • Compound Sodium Chloride (Salt) • Element Salt Water • Heterogeneous Pure • Homogeneous Oxygen • Mixture Matter

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