Import Question JSON

$\text{HINT: Ionisation energy cannot be zero.}$ $\text{Explanation:}$ $\text{Ionisation energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.}$ $\text{In the periodic table, no element has zero ionization energy. So, here option fourth is the correct answer.}$ $\text{Additional explanation:}$ $\text{The question asks for an element with very high electron affinity but zero ionisation enthalpy. However, this is physically impossible because:}$ $\text{1. Ionisation energy is always positive as energy is always required to remove an electron from an atom.}$ $\text{2. Even the most electropositive elements like cesium and francium have positive ionisation energies.}$ $\text{3. Zero ionisation energy would mean that electrons are not bound to the nucleus at all, which contradicts the basic atomic structure.}$ $\text{Therefore, no such element exists, making option 4 "None of the above" the correct answer.}$