Video: Cov ntaub ntawv dab tsi ua rau cov ntawv sau npe hauv cov tshuaj formula muab?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntawv lossis cov ntawv uas sawv cev rau lub ntsiab lus hu ua nws lub cim atomic. Cov lej tshwm li subscripts hauv tshuaj formula qhia tus naj npawb ntawm atoms ntawm lub caij tam sim ua ntej lub subscript . Yog tsis muaj subscript zoo nkaus li, ib qho atom ntawm lub ntsiab yog tam sim no.
Qhov sib thooj, 2 lub hom phiaj ntawm cov ntawv sau npe hauv cov qauv tshuaj yog dab tsi?
Cov subscript " 2 " txhais tau hais tias ob lub atoms ntawm lub caij hydrogen tau koom ua ke los tsim ib lub molecule subscript tsuas yog siv thaum muaj ntau tshaj ib lub atom raug sawv cev. Daim duab hauv qab no qhia txog qhov qauv rau dej siv cov cim. Qee cov molecules ntau dua thiab lawv tshuaj formula.
Ib yam li ntawd, cov tshuaj formula qhia koj li cas? Lub compound yog ib yam khoom uas tsim los ntawm ib qho kev faib ua feem ntawm ob lossis ntau lub ntsiab lus. A chemical formula qhia peb tus naj npawb ntawm atoms ntawm txhua lub ntsiab lus hauv ib qho chaw. Nws muaj cov cim ntawm cov atoms ntawm cov ntsiab lus tam sim no nyob rau hauv lub compound thiab muaj pes tsawg tus muaj rau txhua lub caij nyob rau hauv daim ntawv ntawm subscripts.
Ib yam li ntawd, koj tuaj yeem nug, vim li cas nws tseem ceeb kom tau txais cov ntawv sau raug raug hauv cov qauv?
Teb thiab piav qhia: Subscripts tshwj xeeb yog tseem ceeb hauv kev tshawb fawb vim tias tsis muaj lawv, ntau cov tshuaj lom neeg thiab cov molecules yuav tsis ua sib npaug.
Dab tsi yog N subscript A hauv chemistry?
Tshuaj cov qauv siv cov tsiaj ntawv thiab cov lej los sawv cev tshuaj hom (piv txwv li, compounds, ions). Cov lej tshwm li subscripts hauv tshuaj formula qhia tus naj npawb ntawm atoms ntawm lub caij tam sim ua ntej lub subscript . Yog tsis muaj subscript zoo nkaus li, ib qho atom ntawm lub ntsiab yog tam sim no.
Pom zoo:
Lub npe rau ib yam khoom tsim nyob rau hauv cov tshuaj tiv thaiv tshuaj yog dab tsi?
Cov tshuaj tiv thaiv tshuaj yog cov txheej txheem uas cov atoms tam sim no nyob rau hauv cov tshuaj pib rov ua kom muab cov tshuaj sib xyaw tshiab tam sim no hauv cov tshuaj tsim los ntawm cov tshuaj tiv thaiv. Cov tshuaj pib ntawm cov tshuaj tiv thaiv tshuaj hu ua reactants, thiab cov tshuaj tshiab uas tshwm sim hu ua cov khoom
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Cov yam ntxwv ntawm cov ntaub ntawv twg yog qhov ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis heev?
Variation: Ib qho kev ntsuas ntawm tus nqi uas cov ntaub ntawv muaj nuj nqis sib txawv. ? Kev faib tawm: Cov xwm txheej lossis cov duab ntawm kev sib kis ntawm cov ntaub ntawv hla ntau qhov tseem ceeb (xws li tswb-puab). ? Outliers: Cov qauv piv txwv uas nyob deb heev ntawm feem ntau ntawm lwm cov qauv nqi
Thaum muab piv cov qauv sau rau ib tus neeg raug liam cov ntaub ntawv lub hnub nyoog sib txawv ntawm cov ntaub ntawv yuav tsum tsis pub tshaj kaum ob lub hlis?
Thaum piv cov qauv sau rau tus neeg raug liam? cov ntaub ntawv, lub hnub nyoog sib txawv ntawm cov ntaub ntawv yuav tsum tsis pub ntau tshaj rau rau kaum ob lub hlis. Tus lej txaus ntawm tus qauv yog qhov tseem ceeb rau kev txiav txim siab qhov tshwm sim ntawm kev sib piv
Dab tsi yog cov cuab yeej lossis cov ntaub ntawv uas tus Kws Tshawb Fawb xav tau los txheeb xyuas cov ntaub ntawv nug?
Cov ntaub ntawv raug nug hauv chav kuaj ua txhaum cai yog nruab nrog lub tshuab ntsuas ntsuas, ntsuas cov duab digital, infrared thiab ultraviolet lub teeb ci, cov cuab yeej tshuaj ntsuam video thiab cov cuab yeej tshwj xeeb suav nrog cov khoom siv hluav taws xob tshawb pom electrostatic (EDD) thiab cov khoom siv los ua chemistry