Exam 1 part 2

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studysuccess
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214889
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Exam 1 part 2
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2013-04-21 19:30:05
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exam 1 part 2, chemistry 121, chemeketa Community college
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  1. what are the other names for atomic mass
    • atomic weight, # of protons+neutrons.
    • Weight=mass
  2. electrons are ____ smaller than protons.
    1/1837 of a proton or H.
  3. Dalton's model of the atom
    • 1) elements are composed of minute, indivisible particles called atoms.
    • 2) atoms of the same element are alike in mass and size.
    • 3) atoms of different elements have masses and sizes.
  4. What part of Dalton's model had to be modified:
    • the neutron # of an isotope increases mass.  They had to modify the statement:
    • atoms of the same element are alike in mass and size.
  5. Who discovered ion
    Michael Faraday
  6. Who discovered the electron and structure of the atom
    J.J. Thomson discovered the electron is in the sphere with the neutrons and protons packed in the center.
  7. Who discovered neutrons
    chadwick
  8. Explain isotopic notation in where these are located:

    Mass number
    Atomic number
    Symbol
    Atom Charge
    • Mass number (top left)
    • Atomic number (bottom left)
    • Symbol (right)
    • Atom Charge (top right)
  9. How to you calculate the mass number?
    Protons+neutrons= atomic number.
  10. how many electrons does an atoms have (Al+3) if it give it's 2 electrons?
    10 electrons, because Aluminum has 13 proton=13 electrons.

    13-3=10.
  11. How many electrons does Cl^-1 have if it has the mass #37?
    18 electrons, because Cl has 17 protons, 17 electrons. a -1 charge indicates 1 more electrons.
  12. Cl^+2 has ___ electrons
    15 electrons, because it has 17 in a neutral atom.  It lost 2 electrons to get a + charge.
  13. what is the shape volume and how compact are the particles in a solid
    • shape: definite 
    • Volume: definite 
    • particles: compact
  14. what is the shape volume and how compact are the particles in a liquid
    • shape: indefinite 
    • volume: definite 
    • particles: slightly compact
  15. what is the shape volume and how compact are the particles in a gas
    • shape: indefinite
    • volume: indefinite
    • particles: highly compressible/spaced
  16. charge and group A1
    Alkali metals +1
  17. group 2: name & charge
    Alkali earth metals, +2 charge
  18. group 3-12: name & charge
    transition metals & variable charge
  19. group 13: name & charge
    Metalloid (B), and non-metal, +3 charge
  20. group 14: name & charge
    metalloid (Si, Ge), and non-metals variable charge
  21. group 15: name & charge
    non-metal and metalloid (Sb), -3 charge.
  22. group 16: name & charge
    non-metals and metalloid (Te), -2 charge
  23. Group 17: name & charge
    Halogen, -1 charge
  24. Group 18: name & charge
    noble gas, 0 charge.

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