Understanding Ionization Energy
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Understanding Ionization Energy

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What does ionization energy represent?

  • The energy needed to move electrons within an atom
  • The maximum energy needed to remove the outermost electron of an atom
  • The energy needed to add electrons to an atom
  • The minimum energy needed to remove the outermost electron of an atom (correct)

    • Why are valence electrons most easily removed from an atom?

  • They are influenced the least by the nucleus (correct)
  • They are closest to the nucleus
  • They have the highest energy levels
  • They are negatively charged

    • How is ionization energy measured?

  • Kilojoules per mole (correct)
  • Grams per liter
  • Moles per liter
  • Liters per kilojoule

    • What does a more positively charged ion imply about its hold on electrons?

    <p>It has a tighter hold on its remaining electrons</p> Signup and view all the answers

    Why does it become increasingly difficult to remove more electrons from an atom?

    <p>Because as electrons are stripped away, it requires more energy to remove them</p> Signup and view all the answers

    What does the formula for ionization energy represent?

    <p>&quot;X&quot; as the atom or molecule, &quot;X+&quot; as the positively charged ion, and &quot;e-&quot; as the removed electron</p> Signup and view all the answers

    What role do valence electrons play in ionization energy?

    <p>They are most easily removed due to their position in an atom's electron cloud</p> Signup and view all the answers

    Why does ionization energy increase across a period?

    <p>As the number of protons in the nucleus increases, they pull electrons more tightly around the nucleus.</p> Signup and view all the answers

    What is the primary reason for the observed decrease in ionization energy down a group on the periodic table?

    <p>A decrease in the number of electron shells or orbitals.</p> Signup and view all the answers

    In relation to ionization energy, what effect does an increase in the number of protons within an element's nucleus have?

    <p>Strengthens the positive charge attracting electrons tightly.</p> Signup and view all the answers

    Why do elements going down a group on the periodic table have lower ionization energy?

    <p>The positive force felt by the outermost electron from the nucleus weakens.</p> Signup and view all the answers

    How does moving from left to right within a period affect ionization energy?

    <p>Increases because of a stronger attraction between protons and electrons.</p> Signup and view all the answers

    What role do electron shells play in determining ionization energy?

    <p>They decrease ionization energy by increasing the distance between electrons and nucleus.</p> Signup and view all the answers

    How does the atomic number correlate with ionization energy?

    <p>Increasing atomic numbers result in higher ionization energy within a group.</p> Signup and view all the answers

    In terms of ions, how does ionization energy relate to their formation?

    <p><strong>Ions</strong> need more energy to form when ionization energy is low.</p> Signup and view all the answers

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