Astronomers xa mus rau tag nrho cov ntsiab lus uas tsis yog hydrogen thiab helium li 'hlau', txawm hais tias cov ntsiab lus xws li oxygen thiab carbon yog suav tias yog cov hlau tsis yog hlau los ntawm chemists. Kev tsim cov hlau yog qhov tshwm sim ntawm stellar evolution.
Puas yog Helium yog hlau lossis tsis yog hlau?
Helium yog ib qho ntawm ntau yam tsis yog hlau uas yog roj. Lwm cov roj uas tsis yog hlau muaj xws li hydrogen, fluorine, chlorine, thiab tag nrho cov pab pawg kaum yim noble (los yog inert) gases.
Vim li cas Helium yog hlau?
Yuav ua li cas helium suav tias yog cov hlau tsis yog hlau raws li nws cov khoom siv tshuaj? Helium yog cov roj zoo; nws tsis koom nrog cov tshuaj tiv thaiv nyob rau hauv cov xwm txheej zoo tib yam. Tab sis cov hlau tsis yog hlau nyiam nce electrons los tsim cov ions tsis zoo.
Puas yog txhuas yog hlau lossis nonmetal?
aluminium (Al), kuj sau ntawv txhuas, tshuaj lom neeg, lub teeb hnyav silvery dawb hlau ntawm pawg loj 13 (IIIa, lossis pawg boron) ntawm lub sijhawm. Aluminium yog cov khoom siv hlau ntau tshaj plaws hauv ntiaj teb cov pob zeb thiab siv dav tshaj plaws tsis yog hlau.
Hloov puas tuaj yeem yaj tau?
Melting point of Helium is -272.2°C. Kub taw tes ntawm Helium yog -268.9 ° C.
