Dej tsis pom ntawm lub rooj zaumvim nws tsis muaj tib lub ntsiab lus. Ib lub ntsiab lus yog ib daim ntawv ntawm cov teeb meem tshaj li tsis tuaj yeem tawg mus rau hauv cov khoom yooj yim uas siv txhua yam tshuaj. Dej muaj hydrogen thiab oxygen.
H20 yog dab tsi ntawm lub rooj zaum?
Piv txwv li, 2 Hydrogen atoms thiab 1 Oxygen atom koom ua H2O, los yog water. Ob Oxygen atoms tuaj yeem koom ua ke rau hom oxygen koj ua pa, uas yog O2. Ob leeg yog cov molecules, vim hais tias 2 los yog ntau dua atoms koom ua ke. … H2O tsis yog lub ntsiab lus vim nws yog ua los ntawm 2 hom atoms - H thiab O.
Lub cim rau dej ntawm lub rooj zaum yog dab tsi?
Tshuaj cim rau dej yog H 2O. Cov atomic tooj ntawm oxygen yog 8, uas txhais tau hais tias nws muaj 2 electrons nyob rau hauv lub 1s orbital, 2 electrons nyob rau hauv lub 2s orbital, thiab 4 electrons nyob rau hauv lub 2p orbital, raws li lub Periodic Table ntawm lub ntsiab hauv daim duab C-7.6.
Tus lej twg yog dej?
Second Element : Dej
Cov tshuaj formula ntawm dej yog H20, txhais tau tias nws yog ua los ntawm ob hydrogen atoms sib koom ua ke rau ib qho oxygen atom.
Vim li cas thiaj hu ua dej?
Lo lus "dej" los ntawm lo lus Askiv qub wæter lossis los ntawm Proto-Germanic watar lossis German Wasser. Tag nrho cov lus no txhais tau tias "dej" lossis "ntub."
