biise Rawalpindi board Grade 9th Physics Notes chapter 3 short long question answer Periodic Table and Periodicity of Properties. Mcqs 1. Find the successive elements of the periodic table with ionization energies, 2372, 520, and 890 kJ per mol, respectively (a) Li, Be, B (b) H, He, Li (c) B, C, N (d) He, Li, Be […]
Periodic Table and Periodicity of Properties chemistry bise rawalpindi class 9
