Iav yog qhov tseem ceeb kev lag luam raw khoom thiab cov khoom tsim tawm. Nws tau zoo meej thiab tshuaj lom neeg ruaj khov. Thiab iav muaj qhov sib txawv ntawm cov ntaub ntawv raw khoom nrog tus nqi thiab cov txheej txheem tsim khoom lag luam yooj yim. Ntau cov khoom lag luam ua los ntawm cov iav tau siv dav hauv lub neej txhua hnub, kev lag luam thiab kev ua liaj ua teb, thiab kev tshawb fawb txog science. Iav yog inseparablefrom lub tsev qhov rai, tsom iav, lub teeb ua haujlwm kom pom qhov rai ntawm qhov chaw dav.
Cov neeg ua kev sim ntau yam hauv kev qhia txog chemistry thiab ib txwm cia siab tias yuav pom cov tshuaj lom cov tshuaj mus rau hauv lub thawv ncaj qha. Tsuas yog iav tuaj yeem ua qhov no. Lub iav tsis yog tsuas yog pob tshab, tab sis kuj tiv taus xeb los ntawm ntau yam tshuaj lom neeg lub cev. Cov hlau tsis huv yuav yauv raug tshuaj thaum lawv ntsib cov kua qaub. Txawm tias qhov tseem ceeb tshaj" huab tais cov hlau" kub tau tamed thiab yaj thaum nws ntsib" aqua regia" uas yog sib xyaw ntawm hydrochloric acid thiab nitric acid. Tsuas yog iav tsis ntshai tsam xeb los ntawm hydrochloric acid, sulfuric acid, nitric acid los yog txawm aqua regia. Tsuas yog caustic alkali tuaj yeem me ntsis corrode ib txheej ntawm iav. Yog li no, iav tau nrov nyob ntawm cov neeg nyiam siv.Yog li cov cuab yeej siv iav deb tseem yog cov cuab yeej siv feem ntau hauv chav kuaj tshuaj.