Chemistry test 3

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Author:
westerngal95
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181277
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Chemistry test 3
Updated:
2012-11-02 00:43:23
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Chem test periodic table
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Description:
periodic table chem. sucks. blah.
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  1. How are symbols for elements written?
    First letter uppercase, second (if any) lower case.
  2. Where do symbols for elements come from?
    Fist letter of current name, letters that make you say the word of the current name, and from the original name.
  3. How do scientists assign names to elements they discovered?
    Different language discriptive words, where element was discovered, named after scientist who discovered it. 
  4. What makes parts of an atom? 
    • Proton- (+) in nucleus. located by atomic # (smaller number)
    • Neutron- (neutral) In nucleus. Located by mass # - atomic #
    • Electron- (-) energy levels outside nucleus. Find by atomic # because in a neutral atom protons and electrons are equal. 
  5. Atomic Mass 
    Atomic Number
    • Atomic Mass - Protons and Neutrons
    • Atomic Number- Protons
  6. Atomic Symbol (aXz) equals?
    • A=Mass Number
    • X= element symbol
    • Z=Atomic #
  7. Isotope
    Atom of same type that has same number of protons but different number of neutrons. (change in neutrons) To identify look at mass # and compare to table mass #. 
  8. Alkali Metals 
    Group 1. Without H. 
  9. Alkaline Earth Metals
    Group 2
  10. Transition Metals
    Group 3-12
  11. Halogens
    Group 17
  12. Noble Gases 
    group 18
  13. Lanthanides 
    Group 51-71 and 57 and 89
  14. Actinides 
    group 89-103
  15. Metalloids 
    staircase. Metals and non-metals
  16. Staircase
    14. 32. 33. 51. 52. 84
  17. Diatomic elemts 
    tripple 7+1
  18. Metals 
    to left 
  19. non-metals
    to right
  20. group charges 
    (+1)(+2)(whatever)(+3)(+-4)(-3)(-2)(-1)(0)
  21. three properties of metals
    shinny, malable, ductile
  22. Ion
    compounds that are formed by gaining or losing electrons
  23. 3 properties of Ionic substance
    • non and real metal
    • conduct electricity
    • charge of 0

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