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Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of iodine ...

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


Heating a white substance produces a vapor and black material Was the ... What element when burned produces a violet vapor with an unpleasant odor? iodine.

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.

Halogen elements Facts, information, pictures | Encyclopedia.com ...


Get information, facts, and pictures about Halogen elements at ... to collect potassium nitrate when he noticed that a beautiful violet vapor was produced. When ...

Flame Test Colors - Chemistry Geek

chemistrygeek.com/Descriptive Colors.doc

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.

Gas Discharge Tubes - Chemical Education Homepage


Hydrodgen, Blue-violet. 2. ... Mercury Vapor, Blue-violet. 8. ... These colors can be used to produce atomic emmision spectra of the elements electrically excited.

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Feb 2, 2009 ... discovery of a new element that is now known to us as iodine. ... substance appeared as a vapor of beautiful violet color and con- densed as black ... concentrated, so as to produce much heat, the substance ap- pears as a ...

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


Aug 16, 2013 ... Physiologically, iodine is an essential element, required for the ... and iodine react to produce spectacular clouds of purple iodine vapour.

"Solid iodine, contaminated with salt, was heated until the iodine ...


The violet vapor of iodine was then cooled to yield the pure solid. ... "A sample of mercury(II) oxide was heated to produce mercury metal and oxygen gas.

Reaction between aluminium and iodine- Learn Chemistry


This is a spectacular demonstration as clouds of purple iodine vapour are produced. ... chemistryExpositionElementsCompoundsGroup 3: boron-thallium Group 7: ... exothermic, and the excess iodine vaporises, forming a deep violet vapour.

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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 ...

Group VIIA: Halogens | ChemPaths


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.