Sus juegos

Discovery of cathode rays , nature of cathode rays and Properties of cathode rays

Line spectrum , Bohr's explanation .

Arrhenius model of acid and base Bronsted - Lowery model of acid and base Short coming of Arrhenius model

Motion of two cars in the same direction Motion of 2 cars in opposite direction. Relative speed

Density meaning rule of density unit density application in our daily life

Define atom Structure of atom Atomic mass and atomic number Symbols of some elements.