Dalton's Model of the Atom Quiz
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Questions and Answers

Which of these observations contributed to Dalton’s model of the atom?

  • Most of the elements exist as solid materials under normal conditions on Earth.
  • Several different elements can have very similar chemical properties. (correct)
  • A pair of elements can form several compounds that are composed of different ratios of the elements.
  • Compounds made up of two elements can have properties that are very different from either element.

    • What is the average atomic mass of strontium?

  • 87.7 amu
  • 86.3 amu
  • 86.5 amu (correct)
  • 87.2 amu

    • Based on their locations on the periodic table, which statement about sodium and potassium is true?

  • Sodium has a larger ionic radius than potassium. (correct)
  • Sodium is less electronegative than potassium.
  • Sodium has fewer orbital shells than potassium.
  • Sodium has lower ionization energy than potassium.

    • The atomic number of aluminum is 13. What is the correct designation of the electron configuration of aluminum?

    <p>$1s^22s^22p^63s^23p^2$</p> Signup and view all the answers

    What is the electron configuration of this atom?

    <p>$1s^22s^22p^63s^23p^6$</p> Signup and view all the answers

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