🌟Important Increasing Orders
1️⃣ 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.)
2️⃣ 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
3️⃣ Electronegativity
(i) As, P, S, Cl
(ii) I, Br, Cl, F
(iii) C, N, O, F
4️⃣ Oxyacids Of Halogen
1. Hypochlorous acid- HClO
2. Chlorous acid - HClO2
3. Chloric acid - HClO3
4. Perchloric acid - HClO4
5️⃣ Acidic Strength
HClO < HClO2 < HClO3 < HClO4
6️⃣ Oxidising Nature
HClO > HClO2 > HClO3 > HClO4