History and Properties of the Periodic Table
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Questions and Answers

Which element has the most electronegativity?

  • Fluorine (correct)
  • Sulfur
  • Oxygen
  • Nitrogen

    • What is the electronegativity of chlorine?

  • 3.5
  • 2.5
  • 2.2
  • 3.0 (correct)

    • Why is oxygen more electronegative than sulfur?

  • Oxygen has more valence electrons than sulfur (correct)
  • Oxygen has 2 energy levels, sulfur has 3
  • The bonding electrons in sulfur are further away from the nucleus of the atom
  • Oxygen has 8 protons in the nucleus whereas sulfur only has 7

    • What is the trend of electronegativity in a group?

    <p>Electronegativity increases</p> Signup and view all the answers

    What is the ability measured by electropositivity?

    <p>Ability to donate electrons</p> Signup and view all the answers

    Which statement best describes the trend of atomic size in the periodic table?

    <p>The atomic size increases on descending a group, but decreases across a period from left to right.</p> Signup and view all the answers

    What is the trend of ionization energies in the periodic table?

    <p>The ionization energies decrease on descending a group, but increase across a period.</p> Signup and view all the answers

    What happens to the energy when an electron is added to a neutral atom in the gaseous state to form a negative ion?

    <p>The energy is absorbed (endothermic process).</p> Signup and view all the answers

    What is the difference between a stable atom and an unstable atom?

    <p>A stable atom has no ability to gain or lose electrons, while an unstable atom can easily gain or lose electrons.</p> Signup and view all the answers

    Which factor affects the stability of an element when adding an electron?

    <p>The element's electron affinity</p> Signup and view all the answers

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