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Chemistry has existed under various names since ancient times. It has evolved, and now chemistry encompasses various areas of specialisation, or subdisciplines, that continue to increase in number and interrelate to create further interdisciplinary fields of study.
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Chemistry is a branch of science that deals with chemical elements and compounds, and how they work together and change. In other words, chemistry is the branch of science about fundamental properties of matter and chemical reactions. Chemistry is the study of the substances and their transformations (or change).
A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes a chemical element is the atom. Chemical elements are identified by the number of protons in the nuclei of their atoms, [1] known as the element's atomic number. [2]
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