Question

The first ionization enthalpies of alkali and alkaline earth metals are generally low.However, ionization enthalpies of 2A group elements are higher tha 1A group elements

Answer 1

Answer:

because in a group ionisation enthalpy increase left to right across the table because nuclear charge increases due to decrease in atomic radius so the electron are tightly held by the nucleus hence ionisation enthalpy is higher in 2A group as it require large amount of energy to remove an electron which is nothing but I.E