Video: Lub sij hawm twg yog siv rau electrons hauv lub plhaub sab nraud?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Piav: Lub lub plhaub sab nraud lub npe hu ua "valence plhaub ". Yog li ntawd, lub electrons hauv lub plhaub sab nraud lub npe hu ua "valence electrons ".
Ntawm no, dab tsi yog cov electrons nyob rau hauv lub plhaub sab nraud hu ua?
Tus naj npawb ntawm electrons hauv lub plhaub sab nraud ntawm ib qho atom tshwj xeeb txiav txim siab nws cov reactivity, los yog nyiam tsim cov tshuaj bonds nrog lwm cov atoms. Qhov no lub plhaub sab nraud yog lub npe hu ua lub valence plhaub , thiab cov electrons pom hauv nws yog hu ua valence electrons.
Tsis tas li ntawd, cov ntsiab lus twg muaj lub plhaub sab nraud? Raws li qhia hauv, pawg 18 atoms helium (Nws), neon (Ne), thiab argon (Ar) txhua tus tau sau cov plhaub hluav taws xob sab nraud, ua rau nws tsis tsim nyog rau lawv kom nce lossis poob electrons kom muaj kev ruaj ntseg; lawv ruaj khov heev li ib atoms. Lawv tsis-reactivity tau ua rau lawv lub npe hu ua inert gases (los yog noble gases).
Ib yam li ntawd, nws yog nug, lub sij hawm twg yog siv los piav txog cov electrons nyob rau sab nraud ntawm lub zog?
Cov electrons ntawm lub zog sab nraud ntawm lub atom hu ua valence electrons . Lub valence electrons koom nrog hauv kev sib txuas ntawm ib lub atom mus rau lwm tus. Qhov attraction ntawm txhua atom lub nucleus rau lub valence electrons ntawm lwm lub atom rub cov atoms ua ke.
Dab tsi yog txhais los ntawm lub sij hawm sab nrauv?
Txhais ntawm valence plhaub .: cov lub plhaub sab nraud ntawm ib lub atom uas muaj valence electrons.
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