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GLE #1

GLE #1. Both elements and compounds are pure substances Compounds are made by chemically combining 2 or more elements (the only way to break down a compound is by another chemical change-they break into smaller compounds and elements) Smallest piece of an element is an atom

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GLE #1

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  1. GLE #1 • Both elements and compounds are pure substances • Compounds are made by chemically combining 2 or more elements (the only way to break down a compound is by another chemical change-they break into smaller compounds and elements) • Smallest piece of an element is an atom • Smallest piece of a compound is a molecule

  2. Hydrogen + Oxygen H(2): Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine O: Oxygen (gas) very reactive, needed for fire

  3. Water H2O- water liquid (typically) puts out fire

  4. Sodium + Chlorine Na: Sodium (solid, metal) Reacts violently w/water Cl: Chlorine (gas) Poisonous

  5. Table Salt NaCl – table salt safe to eat dissolves in water solid

  6. Carbon + oxygen C: Carbon (solid) charcoal/diamonds O: Oxygen (gas) very reactive, needed for fire

  7. Carbon Dioxide CO2- carbon dioxide what animals exhale what plants take in

  8. Carbon+Hydrogen+Oxygen C (6): Carbon (solid) charcoal/diamonds H (12): Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine O (6): Oxygen (gas) very reactive, needed for fire

  9. Glucose (Sugar) C6H12O6- glucose (sugar) dissolves in water solid edible

  10. Nitrogen + Hydrogen N: Nitrogen (gas) not reactive as an element H (3): Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine

  11. Ammonia NH3- ammonia gas pungent odor dissolves in water (household cleaner) used in fertilizers, plastics and explosives

  12. Sodium+Hydrogen+Carbon+Oxygen Na: Sodium (solid, metal) Reacts violently w/water H: Hydrogen (gas) burns, reacts explosively with oxygen, chlorine and fluorine C: Carbon (solid) charcoal/diamonds O (3): Oxygen (gas) very reactive, needed for fire

  13. Baking Soda NaHCO3- Baking Soda (sodium bicarbonate) cleaning (clothes, teeth, etc.) cooking deodorizing puts out grease and electric fires

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