Metallic cim hais txog rau qib ntawm kev ua haujlwm ntawm cov hlau. Cov hlau zoo li plam electrons hauv tshuaj lom neeg, raws li qhia los ntawm lawv cov ionization qis. Nyob rau hauv ib tug compound, hlau atoms kuj tsis tshua muaj attraction rau electrons, raws li qhia los ntawm lawv cov electronegativities tsawg.
Yuav ua li cas thiaj paub tus cim xim hlau?
Lub cev muaj zog cuam tshuam nrog cov cim xim hlau muaj xws li nws yog xim hlau luster, ci ntsa iab zoo nkauj, siab ceev, siab thermal conductivity, thiab hluav taws xob conductivity siab. Cov hlau feem ntau yog malleable thiab ductile thiab tuaj yeem deformed yam tsis muaj kev tawg.
Yuav ua li cas yog hlau khoom hauv chemistry?
Ib yam khoom siv hlau xa mus rau nws txoj kev xav kom coj zoo li cov ntsiab lus uas tau muab cais ua cov hlau hauvlub sijhawm sijhawm. Qhov no nyob ntawm cov txheej txheem tshuaj lom neeg feem ntau cuam tshuam nrog cov khoom siv hlau, tshwj xeeb tshaj yog lub peev xwm ntawm lub caij kom poob nws cov valence electrons sab nraud.
3 yam khoom hlau yog dab tsi?
Peb yam khoom ntawm cov hlau yog:
- Luster: Cov hlau yog ci ntsa iab thaum txiav, khawb, lossis polished.
- Malleability: Cov hlau muaj zog tab sis malleable, uas txhais tau hais tias lawv tuaj yeem khoov los yog zoo li tus. …
- Conductivity: Hlau yog qhov zoo tshaj plaws ntawm hluav taws xob thiab cua sov.
Lub ntsiab lus twg muaj cov cim xim hlau siab tshaj plaws?
Peb pomCesium, strontium, txhuas, sulfur, chlorine, thiab fluorine ntawm lub rooj zaum. Cesium yog qhov deb tshaj plaws ntawm sab laug thiab qis tshaj, thaum fluorine yog txoj cai nyob deb tshaj plaws thiab siab tshaj, yog li peb paub tias lawv muaj cov cim xim hlau siab tshaj plaws thiab cov xim hlau qis tshaj plaws, feem.
