Thealkalimetals,foundingroup1oftheperiodictable(formerlyknownasgroupIA),areveryreactivemetalsthatdonotoccurfreelyinnature.Thesemetalshaveonlyoneelectronintheiroutershell.Therefor...

碱土金属(alkaline-earthmetals):周期系ⅡA族元素，包括铍（Be）、镁（Mg）、钙（Ca）、锶（Sr）、钡（Ba）、镭（Ra）六种金属元素。因为这些金属的氧化物既是熔点很高的，它们溶于水又显较强的碱性，历史上曾经把...

particularlythelasttwomembersofthegroup,arealmostasreactiveasthealkalimetals.ThegroupIIBelements—zinc,

reducingagent,alkali,alkalimetals,foodchemicals,etc.mixedmixedtransportation.Transportationemergencytransportvehiclesshouldbeequippedwithleak-processingequipment.Transportationshouldpreventexposure,..

A的alkalimetals,B的sameatomicmass原文都没说;D说相邻元素性质相近与原文相反。3.修辞目的题,先找到两个人名,说两个人都非常有远见,在周期表中给没发现的元素留了空隙,也就是A说的他们足够自信认为元素周期律适用于所有元素;...

Group1(withonevalenceelectron)andGroup2(withtwovalenceelectrons)arecalledthealkalimetalsandthealkaline-earthmetals,respectively.TwoseriesofelementsbranchofffromGroup3,whichcontainsthe...

Hereweshowthatametallicwatersolutioncanbepreparedbymassivedopingwithelectronsuponreactingwaterwithalkalimetals.Althoughanalogousmetallicsolutionsofliquidammoniawithhighconcentrationsofsolvated...

metal的意思有以下几种：n.金属；合金；vt.以金属覆盖；adj.金属制的。年轻人都喜欢K歌，有的小伙伴们歌喉不好但是还喜欢唱怎么办呢？现在市面上出现了好多K歌软件，但全民K歌，绝对是手机K歌史上的扛鼎之作。全民...

4.碱金属(alkalimetals)、碱土金属(alkalineearthmetals)及其常见化合物的重要性质和用途;5.絽(Al)、铁(Fe)、铜(Cu)及其常见化合物的重要性质和用途。三、有机化学1.有机物的特点、有机物的命名(IUPAC命名法);2.典型...

Relationshipsintheperiodictable:horizontal,vertical,anddiagonalwithexamplesfromalkalimetals,alkalineearthmetals,halogens,andthefirstseriesoftransitionelementsIntroductiontoorganicchemistry...