Chemistry

Chemistry                                                                                                          (9th to 10th level)
What is Chemistry?

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Chemistry the branch of science that deals with the composition, structure, properties and reactions of matter, is called chemistry.
Explanation
Chemistry is concerned with atoms  and particularly with the properties of chemical bonds^.
Chemistry is called "the central science" because it connects with other science subjects.
like that ,Biology, physic and geology.
In chemistry we can study elementary particles, atoms, molecules, substances, metals, crystals