Question

Define ie1 and ie2 why ie2>ie1 ?

Answer 1

Explanation:

Ionisation Energy or Ionisation Enthalpy is the enrgy required to remove the most loosely bound electron from an isolated gaseous atom . and IE1 , IE2 , these are the removal of first as well as second electron from an atom and the notation that u have given is wrong , the second ionisation energy is always more than that of first ionisation energy beacuse , once a atom looses one electron , then it will trying to make it more stable , so, the force that nucleaus exert on outer shell electron will be increased , in that case we have to apply more force for removing the 2nd electron .  

FACTORS AFFECTING IE  

1 - Atomic radius

2 - Nuclear charge

3 - Orbital penetration  

4 - Sheilding or screening effect

5 - Electron pairing within a subshell .