Question

what happens to ionization enthalpy across a period and down the group

Answer 1

down the group it decreases and along a period it increases

Answer 2

lionization enthalpy:-)

lt is the amount of energy which is required to remove most loosely bonded electron from an isolated gaseous particle.

Change in ionization enthalpy :-)

☆Along period :-

along the period ionization enthalpy increases due to increase in nuclear charge.

inert gases have extra stability so there ionization enthalpy is maximum.

Along group:-

on moving down the group size of atom increases ionization enthalpy decrease due to decrease in force of attraction.