9th Class Chemistry Guess Paper Long Questions
Chemistry Guess Paper for 9th Class
Long Questions of 9th Class Chemistry Guess Paper
Defects in Rutherford Model, Bohr Atomic Theory,
Properties of Cathode Rays, Discovery of Proton and electronic configuration of CA and MG,
Uses of isotopes. Modern Periodic Table
Units of Atomic Radius.Trend of Ionization Energy in a group.