iitdreams.com

RADIOACTIVE DECAY
The atomic number and the atomic of a substance are changed, because of emission of alpha and beta particles, and gamma rays. Thus, we say that the substance has degenerated or it has decayed. As a result of this decay the original atom is lost and a new […]

Physical chemistry
The branch of chemistry that deals with the science of the composition, structure, properties, and reactions of matter, especially of atomic and molecular systems and the composition, structure, properties, and reactions of a substance.