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Eng Course- Chemistry Quizzes and Practice Problems- Download Free PDF


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Chemistry, a branch of physical science, is the study of the composition, properties and behavior of matter.[1][2] Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds. Chemistry is also concerned with the interactions between atoms (or groups of atoms) and various forms of energy (e.g. photochemical reactions, changes in phases of matter, separation of mixtures, properties of polymers, etc.).
Chemistry is sometimes called "the central science" because it bridges other natural sciences like physicsgeology and biology with each other.[3][4] Chemistry is a branch of physical science but distinct from physics.[5]
The etymology of the word chemistry has been much disputed.[6] The genesis of chemistry can be traced to certain practices, known asalchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East.
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