Science chapter 15.txt

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Science chapter 15.txt
2013-05-17 07:48:22

As of may 2
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  1. Silvery colored solids with low densities and low melting points
    Alkali metals
  2. Group 1
    Alkali metals
  3. More Reactivity than alkaline earth metals
    Alkali metals
  4. Potatoes and table salt
    Alkali metals
  5. Bananas and lithium batteries
    Alkali metals
  6. Group 2
    Alkaline earth metal
  7. Less reactive then Alkali meals
    Alkaline earth metals
  8. Has a higher melting then Alkali metals
    Alkaline earth metals
  9. is denser and harder than Alkali metal
    Alkaline earth metals
  10. Group 13
    The boron family
  11. Used to make cookware, aluminum, glaiuium
    the boron family
  12. Group is all metals except one
    The boron family
  13. Group 14
    The carbon group
  14. Group contains the elements tin and led which are the heaviest elements
    The carbon group
  15. Include silican and germanium
    The carbon group
  16. Semiconductors , doesn't conduct electricity like metal
    the carbon group
  17. Include metals, metaloids, and non metals
    the carbon group
  18. Group 15
    The nitrogen group
  19. Parts of the biological material that store genetic info and energy in living organisms
    The nitrogen group
  20. Include the element phosphorus
    The nitrogen group
  21. Used to make ammonia, feterlizer, disenfectants, used to freeze dry food
    The nitrogen group
  22. contains the elements sulfur, selenecium
    The oxygen family
  23. Group includes nonmetals and metalloids
    the oxygen family
  24. Used to make foam used by firefighters
    The oxygen family
  25. ozone is made up of oxygen and protect us from the UV rays
    the oxygen group
  26. Light meters and solar cells and sulfuric acid
    The oxygen group
  27. Group 17
    the halogens group
  28. forms salt with Alkali metals
    The Halogens group
  29. Chlorine, iodine, florine, bromine
    The halogens group
  30. Group 18
    The noble gases
  31. reactivity low
    The noble gases
  32. helium
    The noble gases
  33. How did the periodic table change over time?
    1st , elements were arranged by order of their increasing atomic mass, now, they are arranged by their increasing atomic number
  34. What are periods?
    Row of elements going across in the table whose properties change gradually
  35. What are groups
    Contains elements that have similar physical and chemical properties
  36. What are non metals?
    gas or brittle solid at room temperature
  37. What are representative elements?
    Groups 1 and 2 and 13-18
  38. What are metals?
    has luster and conducts heat and electricity
  39. What are metaloids?
    shows propertied of a metal and non metal
  40. What are semi conductors
    conducts electricity better than nonmetals, but worst than metals
  41. What are catalyst?
    substance that speeds up chemical reaction, but does not change itself.
  42. What are transition elements?
    Groups 3-12, Actanides series, Lantantides series, and are all metals.
  43. What are synthetic elements?
    Elements made in laboratories
  44. MOst _________ are synthetic elements.
  45. ___________ has magnetic properties.
    Iron Traid elements
  46. All transition elements are ____________.
  47. Most non metals are -______________.
  48. Elements that can be pounded into thin sheets are _________________.
  49. The only non metal found on the left side of the periodic table is __________.
  50. The iron triad is made up of the elements _________, ___________, and _____________.
    iron, cobalt, and nickel
  51. Most transition elements have _________ melting points than the Representative.
  52. ____________ is a poisonous liquid, it can be used in dental materials if mixed with other metals
  53. Describe Actinides.
    • Radioactive
    • Uranium, thorium, and protactinium are the only natural elements.
    • The rest are synthetic elements.
  54. Describe Lanthanides.
    soft metals, similar to others in group, nicknamed rare earths but not as rare as they were thought to be.
  55. Name what is in an element key.
    • atomic number
    • symbol
    • name
    • atomic mass
    • state of matter