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'''Chemistry''' (from [[Egyptian language|Egyptian]] ''kēme'' (chem), meaning [[Classical element|"earth"]] '''See:''' [[Chemistry (etymology)]] for possible origins of this word. is the [[science]] concerned with  the composition, structure, and properties of [[matter]], as well as the changes it undergoes during [[chemical reaction]]s. [http://dictionary.reference.com/browse/Chemistry Chemistry]. (n.d.). Merriam-Webster's Medical Dictionary. Retrieved [[August 19]], [[2007]].  Chemistry is a [[physical science]] related to studies of various [[atom]]s, [[molecule]]s, [[crystal]]s and other  aggregates of matter whether in isolation or combination, which incorporates the concepts of [[energy]] and [[entropy]] in relation to the [[spontaneous reaction|spontaneity]] of [[chemical process]]es.

'''Chemistry''' (from [[Egyptian language|Egyptian]] ''kēme'' (chem), meaning [[Classical element|"earth"]] '''See:''' [[Chemistry (etymology)]] for possible origins of this word. is the [[science]] concerned with  the composition, structure, and properties of [[matter]], as well as the changes it undergoes during [[chemical reaction]]s. [http://dictionary.reference.com/browse/Chemistry Chemistry]. (n.d.). Merriam-Webster's Medical Dictionary. Retrieved [[August 19]], [[2007]].  Chemistry is a [[physical science]] related to studies of various [[atom]]s, [[molecule]]s, [[crystal]]s and other  aggregates of matter whether in isolation or combination, which incorporates the concepts of [[energy]] and [[entropy]] in relation to the [[spontaneous reaction|spontaneity]] of [[chemical process]]es.