Chem Chapter 1

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LaurenCamp29
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233854
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Chem Chapter 1
Updated:
2014-06-14 15:51:13
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chemistry chem goldman marking period one jun
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Junior Chemistry
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  1. The study of matter and the changes it undergoes
    Chemistry
  2. The study of how matter changes over time
    Chemistry
  3. Anything that has mass and takes up space, made up of one or more elements
    Matter
  4. Smallest unit of matter that forms elements and cannot be broken down
    Atoms
  5. Building blocks of matter
    Elements
  6. How many naturally occurring elements are there?
    102
  7. Any material made up of one atom
    Elements
  8. Combination of 2 or more compounds or elements where each keeps their properties
    Mixture
  9. Has very small particles, is liquid, and looks the same throughout
    Homogenous
  10. Mixture of two or more metals
    E. Alloys
  11. Alloy of Brass?
    Copper and Zinc
  12. Composed of 2 or more different elements in a fixed ratio
    Compound
  13. What is so special about Table Salt?
    • It is made of Sodium and Chlorine.
    • Separate, Sodium is explosive and Chlorine is reactive.
    • Put together to make Table Salt, (NaCl) they are not harmful
  14. Element or Compound?:
    MgO
    A compound
  15. Element or Compound?:
    O2
    Element
  16. A substance in which all atoms are the same?
    Element
  17. Is blood a heterogenous or homogenous mixture?
    Heterogenous
  18. Why is blood a heterogenous mixture?
    If you let it sit the blood turns dark. If it separates it is a heterogenous mixture
  19. Mixture, element, or compound?:
    Brass
    Mixture
  20. Mixture, element, or compound?:
    Soda
    Mixture
  21. Mixture, element, or compound?:
    Water
    Compound
  22. Mixtures that look the same throughout?
    Homogenous Mixture
  23. How are the particles in a Solid state of matter?
    Tight
  24. How are the particles in a Liquid state of matter?
    Spreadout
  25. How are the particles in a Gas state of matter?
    Really spread out
  26. Element, Compound, or Mixture?:
    Hydrogen Gas
    Element
  27. Element, Compound, or Mixture?:
    Orange Juice
    Homogenous Mixture
  28. Element, Compound, or Mixture?:
    Saltwater
    Homogenous Mixture
  29. How are a compound and mixture alike?
    They are both made of at least 2 elements
  30. How are a compound and a mixture different?
    A compound has to be destroyed when it's being separated
  31. Element, Compound, or Mixture?:
    Sulfur
    Element
  32. Element, Compound, or Mixture?:
    Wood
    Compound
  33. Element, Compound, or Mixture?:
    Copper
    Element
  34. Element, Compound, or Mixture?:
    Marshmellow
    Homogenous Mixture
  35. Element, Compound, or Mixture?:
    Vanilla Extract
    Homogenous Mixture
  36. Scientist who discovered a positive nucleus, using gold foil experiment
    Rutherford
  37. Scientist who first discovered the neutron
    Chadwick
  38. Scientist that suggested planetary model
    Rutherford
  39. Scientist who came up with the plum pudding model
    Thomson
  40. Scientist who first discovered the electron using cathode ray tube
    Thomson
  41. He stated the conversation matter theory
    Dalton
  42. What is Dalton's First Postulate?
    Matter is made of atoms; atoms are indivisible and indestructible.
  43. What is Dalton's 2nd Postulate?
    All atoms of one element are exactly identical to one another; atoms of different elements are different from one another.
  44. What is Dalton's 3rd Postulate?
    • Law of Multiple Proportions:
    • Elements can combine in different ratios to form different compounds
  45. Dalton's 4th Postulate?
    • Law of Conservation of Mass:
    • The total mass of substances present at the end of chemical process is the same as the mass substances present before the process took place
  46. Which subatomic particle has no mass
    electron
  47. How do you find the atomic number?
    By the number of protons
  48. How do you find the number of electrons in a neutral atom?
    By the number of protons
  49. What does the charge of an atom tell you?
    The electrons
  50. What does the mass number represent?
    Number of protons and neutrons together
  51. How do you find the number of neutrons?
    Subtract the number of protons from the mass
  52. Where is all the mass of an element located?
    Nucleus
  53. Why are electrons ignored when configuring atomic mass?
    They have no mass
  54. When an atom has a negative charge what do you do?
    Add that number to the electrons
  55. When an atom has a positive charge what do you do?
    Subtract that number to the electrons
  56. Why is the mass number not on the periodic table?
    It is too small
  57. A standard we can compare all the elements to
    Atomic Mass Units
  58. Refers to a single atom
    Mass number
  59. Average mass of all the Isotopes?
    Atomic Mass
  60. What is the difference between Atomic Mass and Mass Number?
    • Atomic Mass is not a whole number.
    • Mass Number is a whole number
  61. Why is the Atomic Mass not a whole number?
    Because it is an average of all the Isotopes

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