silicon
Silicon (Taiwan, Hong Kong hu ua silicon) yog cov khoom siv tshuaj, nws cov cim tshuaj yog Si, yav tas los hu ua silicon. Atomic tooj 14, txheeb ze atomic mass 28.09, muaj amorphous thiab crystalline allotrope, allotrope muaj amorphous silicon thiab crystalline silicon. Ib qho hlau zoo li lub hauv paus ntawm IVA pawg ntawm lub rooj zaum.
Crystalline silicon yog steel grey, amorphous silicon yog dub, ntom 2.4g / cm3, melting point 1420 degree, boiling point 2355 degree, crystalline silicon belongs rau atomic siv lead ua, nyuaj thiab ci, semiconductor zog. Silicon cov khoom siv tshuaj muaj zog, thaum kub siab tuaj yeem ua ke nrog oxygen thiab lwm yam khoom, tsis muaj dej, nitric acid thiab hydrochloric acid, soluble hauv hydrofluoric acid thiab lye, siv los ua cov alloys xws li ferrosilicon, silicon steel, monocrystalline silicon cov khoom tseem ceeb semiconductor, siv nyob rau hauv kev tsim cov high-power transistors, rectifier, hnub ci hlwb thiab lwm yam. Silicon yog dav faib nyob rau hauv cov xwm thiab muaj li ntawm 27.6 feem pua ntawm lub ntiaj teb crust. Nws yog feem ntau nyob rau hauv daim ntawv ntawm silica thiab silicates. Crystalline silicon yog xiav tsaus thiab nkig, uas yog ib yam khoom siv semiconductor. Cov khoom siv tshuaj muaj zog heev. Nyob rau hauv chav tsev kub, nws yog ib qho nyuaj rau react nrog lwm yam tshuaj tshwj tsis yog hydrogen fluoride.
