Unsur periode 5: Perbedaan antara revisi

Konten dihapus Konten ditambahkan
Tag: Suntingan aplikasi seluler
Tag: Suntingan aplikasi seluler
Baris 154:
{{main|Kadmium}}
{{UnsurEja|Kadmium|{{IPAc-en|ˈ|k|æ|d|m|i|ə|m}} {{respell|KAD|mee-əm}}|Cd|48}}
<!--ThisLogam softlunak, bluish-whiteputih metalkebiruan isini chemicallykimiawinya similarmirip todengan thedua twologam otherstabil stablelainnya metals indalam [[groupUnsur golongan 12 element|groupgolongan 12]], [[zincseng]] anddan [[mercury (element)|mercuryraksa]]. LikeSeperti zincseng, itCd prefersmemilih [[oxidationbilangan stateoksidasi|tingkat oksidasi]] +2 indalam mostsebagian ofbesar itssenyawanya compoundsdan andseperti like mercuryraksa, itia showsmenunjukkan atitik lowleleh meltingyang pointlebih comparedrendah todibandingkan [[transitionlogam metaltransisi]]s. Cadmium and its [[Congener (chemistry)|congeners]] are not always considered transition metals, in that they do not have partly filled d or f electron shells in the elemental or common oxidation states. The average concentration of cadmium in the Earth's crust is between 0.1 and 0.5 parts per million (ppm). It was discovered in 1817 simultaneously by [[Friedrich Stromeyer|Stromeyer]] and [[Karl Samuel Leberecht Hermann|Hermann]], both in Germany, as an impurity in [[zinc carbonate]].
 
Cadmium occurs as a minor component in most zinc ores and therefore is a byproduct of zinc production. It was used for a long time as a [[pigment]] and for corrosion resistant plating on [[steel]] while cadmium compounds were used to stabilize [[plastic]]. With the exception of its use in [[nickel–cadmium battery|nickel–cadmium batteries]] and [[cadmium telluride]] [[solar panel]]s, the use of cadmium is generally decreasing. These declines have been due to competing technologies, cadmium's [[toxicity]] in certain forms and concentration and resulting regulations.<ref name="ReferenceA">{{cite book|author = |chapter = Cadmium|title = Kirk-Othmer Encyclopedia of Chemical Technology|edition = 4th|place=New York|publisher = John Wiley & Sons|year=1994|volume= 5|pages = }}</ref>-->