The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. Relative atomic mass is also known as atomic weight (symbol: Ar). Standard Atomic Weight Cr: 51.9961(6) Isotopic Composition5283.79%5283.79%539.50%539.50%504.35%504.35%542.37%542.37%...
乌兹别克语 Xrom 越南语 Crom Võro Kruum 中文 鉻 历史 发现地为 1797 发现人为 Louis-Nicholas Vauquelin 发现地为 France 词的起源 From the Greek word "chroma" meaning "colour", named for the many coloured compounds known for chromium. 链接 Wikipedia: 鉻 Periodic Table: 鉻著作...
Rubidium Hexaamidolanthanate and -neodymate, Rb 3 [La(NH 2 ) 6 ] and Rb 3 [Nd(NH 2 ) 6 ]; Compounds. Structurally Related to K 3 [Cr(OH) 6 ] and K 4 CdCl 6 Colourless Rb 3 [La(NH 2 ) 6 ] (a = 12.298(4) , c = 13.759(2) , N = 6, R 3 c) and pale blue...
paler than the body. According to Kellaart, three inconspicuous brown dorsal streaks diverging and terminating on thecrupper, and some very indistinct spots seen only in some lights. Gray says these animals differ in the intensity of the colour of the fur—some are bright golden and others muc...
Colour of chromium: steel-grey Common oxidative states: + 6, + 3, 0 11.4.2 Structure and properties of chromium Chromium and its compounds have a long history of industrial uses in the manufacture of a large number of high-volume products, such as stainless steel and pressure-treated wood....
Cr2O3 前驱体的种类对于后期制备的 Cr2O3 色料的呈色效果影响很大,目前运 用较广的是通过重铬酸盐分解、 CrOOH 分解等, 但是这类方法对于环境污染较重。 因此,需要新型环境友好的制备方法,通过氢氧化铬(Cr(OH)3· xH2O)前驱 体的热分解得到 Cr2O3 这一方法研发了出来,Cr(OH)3· xH2O 是一种普通的...
odour odourless appearance red-orange crystalline solid valency 2 ph 4 oxidation state +6 solubility moderately soluble in cold water and appreciably soluble in hot water. chemical properties of dichromate – cr 2 o 7 2- acidified solution of dichromate forms a deep blue colour with peroxide due...
The samples were prepared at pH 3 and allowed to equilibrate for 31 days before the solid phase was separated from the solution by filtration (control samples of AHA and PHA were equilibrated at pH 3). Aqueous Cr(VI) concentrations were determined colourimetrically (method 7196A; USEPA 1992...
Location: Brecksville, OH Posts: 1621 Good Answers: 18 #3 Re: Cr3 yellow 12/18/200711:23 AM The reason Cr6+ is forbidden is that it is a known cancer causing agent. If you are electroplating from a Cr6+ bath (2 step process), the chrome will plate as Cr6+ and reduce to Cr3+...
Bai, The effects of Al and Ba on the colour performance of chromic oxide green pigment, Dyes Pigm., 80(2009), No.3, p.287. Article CAS Google Scholar M. Srivastava, J.N. Balaraju, B. Ravishankar, and K.S. Rajam, Improvement in the properties of nickel by nano-Cr2O3 ...