Question

Would you except the 1st ionisation enthalpy of two isotopes of the same element to be the same or different.Justify

Answer 1

Ionization potential or enthalpy is the minimum amount of energy which is needed to remove the most loosely bound electron from  a neutral isolated gaseous atom to form a cation also in gaseous state The ionization enthalpy of an atom depends on the number of electrons and protons (nuclear charge) of that atom. Now, the isotopes of an element have the same number of protons and electrons. Therefore, the first ionization enthalpy for two isotopes of the same element should be the same.

Answer 2

Answer:

Ionization enthalpy of any atom relies on its number of protons and electrons. But, the isotopes of any element have equal number of electrons and protons. Thus, the 1st ionization enthalpy of two isotopes of a single element is same.