Ionization Energy,Electron Affinity,Electronegativity

Important Increasing Order

Ionization Energy

(i) Na, Al, Mg, Si
(ii) Li, B, Be, C, O, N, F, Ne, He (Ist I.P.)
(iii) Be, C, B, N, F, O, Ne, He, Li (IInd I.P.)

Electron Affinity

(i) I, Br, F, Cl
(ii) Cu, Ag, Au (EA, of Au is very high = 222 kJ mol–1)
(iii) O, S, F, Cl
(iv) N, P, O, S

Electronegativity

(i) As, P, S, Cl
(ii) I, Br, Cl, F
(iii) C, N, O, F


OXYACIDS OF HALOGEN

1. Hypochlorous acid- HClO
2. Chlorous acid - HClO2
3. Chloric acid - HClO3
4. Perchloric acid - HClO4

Acidic Strength

HClO < HClO2 < HClO3 < HClO4

Oxidising Nature

HClO > HClO2 > HClO3 > HClO4
By: via STUDY MATERIAL