Atoms possessing stable configuration have less tendency to loss and consequently will have high value of ionization enthalpy.
a) Justify this statement by taking the case of halffilled and completely filled configurations.
b) The noble gases have highest ionization enthalpies in each respective periods. Why?

Removal of electron becomes easier on moving down the group. a) Comment the above statement based on ionization enthalpy. b) How electronic configuration influences the ionization enthalpy value?

a) Which is the element among alkali metals having lowest ionization enthalpy? b) What is meant by valence of an element? How it varies in the periodic table?

For successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

Assertion : Noble gases have positive electron gain enthalpy. Reason : Noble gases have stable closed shell electronic configuration.

a) The electron gain enthalpies of Be and Mg are positiVe. What is your opinion? Justify. b) Electron gain enthalpies of nobles gases have large positive values. Why?

Which one of the following statements is incorrect in relation to ionization enthalpy? (1)Ionization enthalpy increases for each successive electron.(2)The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration (3)End of valence electrons is marked by a big jump in ionization enthalpy (4)Removal of electron from orbitals bearing lower n value is higher than from orbital having higher 'n' value.