Web Results

Mercury-vapor lamp - Wikipedia


A mercury-vapor lamp is a gas discharge lamp that uses an electric arc through vaporized ... Clear mercury lamps produce white light with a bluish-green tint due to mercury's combination .... Th...

Which element produces a violet vapor with an extremely ...


Heating a white substance produces a vapor and black material Was the substance an element or a compound? compound as it decomposed into two separate ...

Iodine, Chemical Element - reaction, water, uses, elements, proteins ...


The periodic table is a chart that shows how chemical elements are related to ... He was amazed to see clouds of beautiful violet vapor rising from the mixture. ... Radioactive isotopes are produced when very small particles are fired at atoms.

53. Iodium (Iodine) - Elementymology & Elements Multidict


After the process, the various Sulphur compounds produced during ... added excess sulphuric acid resulting in a violet vapor cloud that condensed on colder ...

Purple fumes: the importance of iodine | www.scienceinschool.org


Aug 16, 2013 ... ... element iodine, from the Greek word iodes, which means purple or violet. ... Physiologically, iodine is an essential element, required for the synthesis ... Most of these radioisotopes, which are produced via fission reactions ...

Research on Iodine Deficiency and Goiter in the 19th and Early 20th ...


In 1811, Courtois noted a violet vapor arising from burning seaweed ash and Gay -Lussac subsequently identified the vapor as iodine, a new element. ... hormones produced by the thyroid gland and is therefore essential for mammalian life.

Group VIIIA: Noble Gases | ChemPaths

chempaths.chemeddl.org/services/chempaths/?q=book/General Chemistry Textbook/Chemistry of the Representative Elements/1454/group-viiia-noble-gase&title=CoreChem:Group_VIIA:_Halogens

Dec 16, 2010 ... Fluorine, the most electronegative element, has no positive oxidation states, but the ... heated, sublimes (changes directly from solid to gas) to a beautiful violet vapor. All the gases produce a choking sensation when inhaled.

Download Article - Iodine Global Network (IGN)


ash he produced an intense violet vapor logy and pathology that crystallized on ... quently identified it as a new element,. Figure 2. and named it iodine, from the ...

The History of Iodine in Medicine Part I: From Discovery to ... - Optimox


The essential element iodine has been kept in the Dark Ages over the last 60 ... to iodine, which sublimated and formed a violet vapor above the preparation. .... One cannot help wondering what complication such therapy may produce in the  ...



A + B AB. A and B represent the reacting elements or compounds while AB represents a compound as the product. ... This reaction produces enough heat to ignite the H2 produced. .... Violet iodine vapor can be observed after the explosion.

More Info

Elements Named for Color


discovery of and naming of elements which were named for color. ... and found it produced an emerald-green solution when dissolved in muriatic ... In 1811 Courtois accidentally added excess sulfuric acid resulting in a violet vapor cloud that ...

Violet Smoke Chemistry Demonstration - About.com


Here are two ways to produce violet smoke for a colorful chemistry demonstration involving the element iodine. ... Produce Clouds of Violet Smoke. Iodine vapor produces the violet color of the smoke. - (c) Philip Evans. Iodine vapor produces ...

Flame Test Colors - Chemistry Geek


Na+ Yellow. K+ Violet. Ca2+ Orange-red. Sr2+ Red. Ba2+ Green. Cu2+ Blue- green .... Cr2O72- Orange. Cu(NH3)42+ Dark Blue; produced when ammonia is added to Cu2+ solutions ... Transition element ions with partially filled d orbitals tend to release colored light. ... I2 Dark-violet vapor & dark metallic looking solid.