Chemistry isayensi kokubili Ukwakheka, isakhiwo nezakhiwo ndaba futhi izinguquko ke sibhekana ngesikhathi ukushintsha kwamakhemikhali kuhlanganise namandla ezihlobene.Linus Pauling lichazwa ngokuthi isayensi izidakamizwa, isakhiwo (izinhlobo kanye namafomu yelungiselelo ukuzulazula kwama-athomu), izakhiwo kanye ukusabela ukuthi aguqule zibe nezinye izinto ireferensi isikhathi, i-chemistry Modern zavela i-alchemy, umkhuba yesiqalo ephathelene nokudabuka-zefilosofi, ngokuhlanganisa izakhi yokuthakwa kwamakhemikhali, yokusansimbi, i-physics, imithi, biology, nezinye izinhlobo zesayensi kanye ubuciko. Lesi sigaba uphela lapho Revolution ucingo yokuthakwa kwamakhemikhali, esekelwe ukongiwa mass futhi inkolelo-mbono omlilo ongoti kwezempilo abathi zihlobene nge-oksijini ngu usosayensi French Antoine Lavoisier zenzeka.
Uyala ziqoqwa ngokuvumelana chemical ekilasini babagcine bengaphansi komthetho cwaningo noma uhlobo cwaningo. Lezi zihlanganisa i-chemistry wezinto ezingaphili, okuyinto study ndaba wezinto; i-chemistry organic, ukutadisha udaba eziphilayo; biochemistry, ukutadisha izinto ezikhona e eziphilayo bayo begazi; Physicochemical ehlanganisa chemical amandla izici izinhlelo macroscopic, izikali ezinto athomu, futhi ukwethembeka, ukuhlaziya amasampula kuncike futhi uzame ukuqonda ngezithako zawo futhi isakhiwo.