Chapter – 1 atom it is the smallest particle of an element which can exist with all the properties of its own element but it cannot exist in atmosphere alone molecule when two or more than two atoms are combined with each other a molecule is formed it can exist freely in nature formula weight.
Physical chemistry is a distinct discipline from chemical physics, but again, there is very strong overlap theoretical chemistry is the study of chemistry via fundamental theoretical reasoning (usually within mathematics or physics) in particular the application of quantum mechanics to chemistry is called quantum chemistry.
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Basic concepts of chemistry chemistry can broadly be defined as the study of matter and its changes the (3) physical states of matter are solids, liquids and gases. Designed to help students incrementally build their knowledge of fundamental concepts of medicinal chemistry and their applications to therapeutic decisions, it is progressively organized the text is also enhanced to make potentially confusing concepts easier to understand.