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In classical science physics was essentially the science dealing with motion: an example of classical physical process is the flowing of water in a tube or the motion of the football ball.

In the same context, chemistry deals with transformation of one molecule in the other (chemical reactions), so that a typical chemical phenomenon is the salt formation by reaction of Hydrochloric Acid with Sodium Hydroxil in water solution that writes

HCl + NaOH (water solution) -> NaCl + H2O (water solution)

With the introduction of quantum theory of atoms and subatomic structures, physics started to describe with physical theories chemical reactions. For example the quantum theory of molecular orbital (without any doubt a physical theory) is the base for the modern explanation of chemical bonds, that are the links maintaining different molecules together.

Moreover, nuclear physics has started to describe much more drastic transformations like nuclear reactions transforming atoms in other atoms.

Thus at today it would be more correct to say that chemistry is a particularly extended branch of physics.

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12y ago
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15y ago

the physical change is -the shape of the candle changes,some of the wax becomes liquid to solid. chemical change-the wick is burned

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15y ago

Baking a cake and hardening of cement.

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Q: What is an example of a Chemical and Physical process?
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