Question

In general, ionisation enthalpy increases from left to right across a period. Give reason

Answer 1

Answer: ionistaion enthalpy is the energy given to remove electrons from an isloated gaseous atom.

As we move left to right across a period the size of atom decreases due to which we have to give more energy to remove an electron ...therefore the ionisation enthalpy as the energy is increased to remove an electron across period