The minimum amount of energy which is required to remove an outermost electron from anyisolated neutral gaseous atom is known as first iosiation energy. These are the following factors which other ionisation energy. (i) Ionisation energy alpha (1)/("principal quantum number") (ii) Ionisation Energy alphaZ_(eff) (iii) If orbitals are fully filled or half filled so stability will be more and ionisation energy will be high (iv) If penultimate electron will effectively shield the mucleus ionisation energy wiill be less and vise versa. Choose the correct order of I^(st) ionisation energy

The minimum amount of energy which is required to remove an outermost

1.	The minimum amount of energy which is required to remove an outermost electron from anyisolated neutral gaseous atom is known as first iosiation energy. These are the following factors which other ionisation energy. (i) Ionisation energy alpha (1)/("principal quantum number") (ii) Ionisation Energy alphaZ_(eff) (iii) If orbitals are fully filled or half filled so stability will be more and ionisation energy will be high (iv) If penultimate electron will effectively shield the mucleus ionisation energy wiill be less and vise versa. Choose the correct order of I^(st) ionisation energy
Answer» `NeltF` `OgtN` `NagtAl` `MggtAl` Solution :`Ne=1s^(2)2S^(2)2p^(6)` `F=1s^(2)2s^(2)2p^(5)` Due to the stable configuration of Ne, 1ST ionisation energy of Ne is greater than Fluorine `MG=[Ne]3s^(2)` `Al=[Ne]3s^(2)3p^(1)` Due to stable configuration of Mg its ionisation energy is greater than Al