Ionizing potential is defined as?

Ionizing potential is defined as?

• A. The energy required to remove the most tightly bound electron.
• B. The energy required to remove the least tightly bound electron.
• C. The energy required to remove a proton.
• D. The energy of photons in the visible spectrum.

Answer: (B)

Ionizing potential is the energy required to remove an electron from an atom. In any atom, electrons closer to the nucleus are more tightly bound than those farther out, so the outermost electron—the least tightly bound one—needs the least energy to be removed. That’s why the ionizing potential corresponds to the energy needed to remove this outer electron. The other ideas don’t fit: removing the most tightly bound electron would require much more energy; removing a proton is a nuclear process, not electronic ionization; and photons in the visible range typically don’t have enough energy to ionize most atoms.

Ionizing potential is the energy required to remove an electron from an atom. In any atom, electrons closer to the nucleus are more tightly bound than those farther out, so the outermost electron—the least tightly bound one—needs the least energy to be removed. That’s why the ionizing potential corresponds to the energy needed to remove this outer electron. The other ideas don’t fit: removing the most tightly bound electron would require much more energy; removing a proton is a nuclear process, not electronic ionization; and photons in the visible range typically don’t have enough energy to ionize most atoms.