Question

multiple-choice question
what is ionization energy?
the atoms tendency to attract electrons
the energy required to remove a valence electron from an atom
the size of the atom

Explanation:

To determine the correct answer, we analyze each option:

• The first option describes electronegativity, not ionization energy.
• The second option matches the definition of ionization energy, which is the energy needed to remove a valence electron from an atom.
• The third option refers to atomic size (atomic radius), not ionization energy.

Answer:

The energy required to remove a valence electron from an atom (the second option)