Question

Define Ionisation enthalpy. Why is the first ionization enthalpy of Beryllium greater than that

of both Lithium and Boron​

Answer 1

ionization enthalpy:

it is a process in which an electrone is removed from an atom and the energy required to remove an electrone is called it's ionization enthalpy

beryllium is having grater ionization enthalpy than lithium and boron because beryllium is having stable electronic configaration and it is tough to remove an electrone from stable atom as compare no non stable atom

hence beryllium is having grater ionization enthalpy than lithium