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How are chemical and physical changes different on a molecular level?

Chemical changes involve the breaking of bonds in molecules.
Physical changes do not involve molecules.
Physical changes cause new molecules to form.

User Ulysses
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Chemical changes involve the breaking of bonds in molecules.
User Rambles
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Answer: Chemical changes involve the breaking of bonds in molecules.

Step-by-step explanation: Chemical change is a change in which there is rearrangement of atoms and thus there is formation of new substances which happens by making and breaking of bonds.

Example of chemical change:


2Na+Cl_2\rightarrow 2NaCl

Physical change is a change in which there is no rearrangement of atoms and thus there is no formation of new substances , thus no making or breaking of bonds is involved. It only involves changes in states.

Example of physical change:


H_2O(s)\rightarrow H_2O(l)

User Hanif Azhari
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