Chemistry 121 Chapter 2 Part 2

13 Questions | Total Attempts: 130

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Questions and Answers
  • 1. 
    For each element the top number next to each element is _____________
    • A. 

      Mass number

    • B. 

      Atomic number

  • 2. 
    For each element the bottom number next to each element is _____________
    • A. 

      Mass number

    • B. 

      Atomic number

  • 3. 
    The ________________________ tells us the the number of protons.
    • A. 

      Atomic number

    • B. 

      Mass number

  • 4. 
    The ________________________ tells us the the number of protons and neutrons
    • A. 

      Atomic number

    • B. 

      Mass number

  • 5. 
    Picture Uranium (U) with the number 238 on the top left and the number 92 on the bottom left.  What is the number of protons?
    • A. 

      238

    • B. 

      146

    • C. 

      92

  • 6. 
    Picture Uranium (U) with the number 238 on the top left and the number 92 on the bottom left.  What is the number of neutrons?
    • A. 

      146

    • B. 

      92

    • C. 

      238

  • 7. 
    Elements that have the same atomic number but different mass number are said the be __________ of each other
    • A. 

      Neutral

    • B. 

      Isotopes

    • C. 

      Enriched

  • 8. 
    You have A) one Uranium with a mass number of 235 and atomic number of 92.  You have another  B) Uranium with a mass number of 238 and atomic number of 92.  Which one is the Isotope?
    • A. 

      B

    • B. 

      A

  • 9. 
    The mass spectrometer (mass spec) is the cornerstone of much of ‘elemental analysis’ and analytical chemistry in general, which was invented by 
    • A. 

      Antoine Lavoiser

    • B. 

      Issac Newton

    • C. 

      Francis William Aston

  • 10. 
    Avogadro's number is the formula ______________________
    • A. 

      6.12 x 10 to the 14th power

    • B. 

      6.022 x 10 to the 23rd power

    • C. 

      3.14 x 10 to the 16th power

  • 11. 
    Atom or molecule that has a distinct charge associated with it.
    • A. 

      Ion

    • B. 

      Atomic Number

    • C. 

      Proton

  • 12. 
    A positive Ionic molecule
    • A. 

      Cation

    • B. 

      Anion

  • 13. 
    A negative Ionic molecule
    • A. 

      Cation

    • B. 

      Anion

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