Vim li cas cov kua nyiaj mercury (Mercury) tseem muaj kua nyob rau hauv chav tsev kub yog feem ntau yog cuam tshuam nrog nws cov yam ntxwv hluav taws xob thiab cov yam ntxwv ntawm cov hlau sib khi hlau. Mercury muaj ib tus lej atomic naj npawb ntawm 80 thiab nws cov kev teeb tsa elecuration yog [XE) Yog li ntawd, cov sib khi hlau ntawm cov mercury atoms tsis muaj zog thiab tsis tuaj yeem tsim cov qauv kev ua kom nruj, ua rau muaj mercury tau ua kua nyob hauv chav tsev.
Ib qho ntxiv, cov khoom siv lub cev ntawm Mercury tseem muaj cov cawv tseem ceeb rau nws lub xeev ua kua. Mercury yog tuab, silvery-dawb kua hloov hlau uas evaporates nyob rau hauv chav tsev kub thiab muaj zoo hluav taws xob thiab thermal ua haujlwm. Cov khoom siv tau ua kom muaj kev sib xyaw ua haujlwm zoo nyob rau hauv cov ntawv thov xws li cov cua sov.