Chemistry Chapter on Atomic Structure
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Questions and Answers

What is the correct abbreviated electron configuration for phosphorus?

  • [Ar] 4s23d3
  • [Kr] 5s24d4
  • [Xe] 6s25f5
  • [Ne] 3s23p3 (correct)
  • According to Hund's rule, how should electrons be distributed in equal energy orbitals?

  • Electrons distribute randomly among all available orbitals.
  • One electron is placed in each orbital before any pairing occurs. (correct)
  • All electrons pair in the lowest energy orbital before others are filled.
  • Electrons occupy higher energy orbitals equally before lower ones.
  • What does the term 'mass number' specifically refer to in atomic structure?

  • The rounded sum of protons and neutrons in an atom. (correct)
  • The average mass of an atom compared to isotopes.
  • The total number of protons in the atom.
  • The sum of protons and electrons in an atom.
  • Which statement correctly describes the behavior of electrons according to the Aufbau principle?

    <p>Electrons occupy the lowest energy orbital that can receive them first.</p> Signup and view all the answers

    What distinguishes an isotope of an element from its other forms?

    <p>Same atomic number but different mass numbers.</p> Signup and view all the answers

    What is the primary reason that electrons occupy the lowest energy orbitals first?

    <p>To maintain the stability of an atom</p> Signup and view all the answers

    Which of the following correctly describes the maximum number of electrons that can be contained within an f orbital?

    <p>14</p> Signup and view all the answers

    Which group in the periodic table contains non-reactive gases?

    <p>Noble Gases</p> Signup and view all the answers

    What does the quantum number representing angular shape indicate about an orbital?

    <p>The type of orbital (s, p, d, f)</p> Signup and view all the answers

    Which statement about valence electrons is true?

    <p>They determine an atom's bonding behavior.</p> Signup and view all the answers

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