Lub atomic qauv ntawm selenium yog dab tsi?
Lub atomic qauv ntawm selenium yog dab tsi?

Video: Lub atomic qauv ntawm selenium yog dab tsi?

Video: Lub atomic qauv ntawm selenium yog dab tsi?
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Daim duab ntawm lub nuclear muaj pes tsawg leeg thiab electron configuration ntawm ib tug atom ntawm selenium-80 (atomic tooj: 34), feem ntau isotope ntawm lub caij no. Cov nucleus muaj 34 protons (liab) thiab 46 neutrons (xiav). 34 electrons (ntsuab) khi rau lub nucleus , successively occupying muaj electron shells (rings).

Kuj paub, dab tsi yog atomic naj npawb ntawm selenium?

34

Qhov thib ob, hom dab tsi yog selenium? Selenium yog ib qho tshuaj lom neeg nrog lub cim Se thiab atomic naj npawb 34. Nws yog ib tug nonmetal (ntau tsis tshua pom ib tug metalloid) nrog cov khoom uas yog nruab nrab ntawm cov ntsiab lus saum toj no thiab hauv qab no nyob rau hauv lub periodic rooj, leej faj thiab tellurium , thiab kuj muaj qhov zoo sib xws rau arsenic.

Kuj nug, dab tsi yog theem ib txwm ntawm selenium?

Lub npe Selenium
Qhov ntom 4,79 g ib xm
Theem ib txwm Khoom
Tsev neeg Nonmetals
Lub sijhawm 4

Selenium hmoov yog dab tsi?

Amorphous selenium yog ib tug reddish hmoov los yog dub, vitreous khoom; crystalline selenium yog xim liab lossis grey, nyob ntawm cov qauv siv lead ua. Cov khoom no zoo ib yam li sulfur nyob rau hauv nws ntau hom thiab nyob rau hauv nws cov tebchaw. Hauv qab nws melting point, selenium yog p-hom semiconductor.

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