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Unit 2: Molecular Matter

Unit 2: Molecular Matter. Organic vs Inorganic Organic: living or once living Inorganic: non-living Organic Substances have C and 1 or more of the following elements C Carbon H Hydrogen O Oxygen P Phosphorus N Nitrogen S Sulfur. Elements, Compounds, Mixtures

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Unit 2: Molecular Matter

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  1. Unit 2: Molecular Matter

  2. Organic vs Inorganic • Organic: living or once living • Inorganic: non-living • Organic Substances have C and 1 or more of the following elements • C Carbon • H Hydrogen • O Oxygen • P Phosphorus • N Nitrogen • S Sulfur

  3. Elements, Compounds, Mixtures • Elements: Found on the Periodic Table • Examples: Oxygen, Carbon, Nitrogen • Compounds: 2 or more elements combined • Ex: Carbon Dioxide (CO2) Water (H2O) • Mixtures: 2 or more substances mix together

  4. Chemical Changes vs Physical Changes • Chemical changes create new substances; rearranges the atoms in a substance • Example: Na + Cl NaCl Sodium + Chlorine  Table Salt • Physical Changes: does not make a new substance • Example: tearing paper, changing states of matter(solid, liquid, gas)

  5. Signs of Chemical Changes • Change in temperature • Gas appears (bubbles) • Precipitate forms • Light • Sound • Change in odor • Color change

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