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9/29/11

9/29/11. I -STARTER: Warm up. Tape in Your Warm up and Complete. Justify Your Answer Choice :. 9/29/11. I -STARTER: Warm up. Tape in Your Warm up and Complete. Justify Your Answer Choice:. II- PRACTICE: We will begin looking at and discussing different elements.

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9/29/11

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  1. 9/29/11 I -STARTER: Warm up Tape in Your Warm up and Complete Justify Your Answer Choice:

  2. 9/29/11 I -STARTER: Warm up Tape in Your Warm up and Complete Justify Your Answer Choice: II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.

  3. It’s All Elemental Elements are all around us … can you recognize them when you see them?

  4. What is an element? • An element is a pure substance that cannot be broken down by chemical means into other substances. • A compound contains two or more elements . • Everything is made up of elements.

  5. What element is this?

  6. Copper –Cu • Used in: • wiring • heat sinks • Coins • brass and bronze alloys (metal mixtures).

  7. But is it really Copper? • Lincoln Memorial penny • dated before 1982 - made of 95% copper. • dated after 1983 - made of 97.5% zinc and plated with a thin copper coating.

  8. What element is this?

  9. Nickel –Ni • classified as an element in 1751. • The Nickel (five-cent) coin – made of 75% copper. • Only 25% is nickel, It actually has more copper than the penny!

  10. What element is in this picture?

  11. Helium –He • Colorless gas • glows pale peach when an electric current runs through it • Used to make balloons float

  12. What element is this?

  13. Aluminum –Al • Malleable • shaped into interesting,beautifuland usefulobjects, like soda cans.

  14. What element is this?

  15. Carbon – C • A diamond, but heat it too much and it burns up into carbon dioxide gas. • Graphite used in pencils • Coal

  16. What element is this?

  17. Calcium –Ca • most people think of chalk and bones • Actually…a silvery metal that reacts with water to give off hydrogen gas

  18. What element is shown here?

  19. Iron –Fe • Meteorite (from ancient Mexico - made mostly of iron. • Locals created tools from • first samples made their way out to the world in the 1700s

  20. What element is this?

  21. Iodine –I • gives off violet vapor when heated • used as disinfectants for cuts and wounds before antiseptic agents were found.

  22. What element is this?

  23. Lead –Pb • Usually seen as Lead pipes

  24. Elements Are All Around Us • All of these elements are found within the Earth, atmosphere, oceans and even in your all living things.

  25. Silicon –Si • computer chips

  26. Nitrogen –N • 78% of the atmosphere

  27. Hydrogen –H • 75% universe is hydrogen, a colorless gas. • The Sun is composed of Hydrogen & Helium

  28. Chlorine –Cl • purifies drinking water and swimming pools. • Combined with sodium, makes table salt

  29. Silver (Ag) and Gold (Au)

  30. Phosphorous –P • Used in matches

  31. Sulfur –S • Has a very distinguishable smell

  32. Sodium –Na • exposed to water -explode in flaming balls of molten sodium. • Mix with Chlorine -creates table salt.

  33. It’s Oxygen –O • Colorless gas • Blue liquid

  34. 9/29/11 I -STARTER: Warm up III- APPLICATION Explain how the physical properties of an element determine how we use that element Tape in Your Warm up and Complete Justify Your Answer Choice: II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.

  35. 9/29/11 I -STARTER: Warm up III- APPLICATION Explain how the physical properties of an element determine how we use that element Tape in Your Warm up and Complete Justify Your Answer Choice: • IV –CONNECTIONS: • Knowing what you have learned about metals, nonmetals, and elements explain: • Why do jewelers use metals instead of nonmetals to make jewelry? II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements.

  36. 9/29/11 I -STARTER: Warm up III- APPLICATION Explain how the physical properties of an element determine how we use that element Tape in Your Warm up and Complete Justify Your Answer Choice: • IV –CONNECTIONS: • Knowing what you have learned about metals, nonmetals, and elements explain: • Why do jewelers use metals instead of nonmetals to make jewelry? II- PRACTICE: We will begin looking at and discussing different elements. Your notes from the discussion will go here to help you prepare for future activities and discussions about elements. V -EXIT: Writing 3-4 sentences summarizing what we have learned so far about elements

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