About site: Chemistry/Elements/Rubidium - Lenntech: Rubidium

About site: http://www.lenntech.com/Periodic-chart-elements/Rb-en.htm

Title: Chemistry/Elements/Rubidium - Lenntech: Rubidium Physical data, chemical properties, and health effects.

Rubidium Data tables and historic information.

Visual_Elements__Rubidium Image, source, uses, physical information, and key isotopes.

WebElements__Rubidium Extensive information on history, uses, occurrence, compounds, and properties of the element.

Wikipedia__Rubidium Properties of the element, including its history, applications, and characteristics.

Radiochemistry_of_Rubidium Full text of the monograph by G. W. Leddicotte (Oak Ridge National Laboratory, Oak Ridge, Tennessee). [PDF] (February, 1962)

Arizona_Odyssey_of_the_Mind Includes regional information and resource section.

Alexa statistic for http://www.lenntech.com/Periodic-chart-elements/Rb-en.htm

Please visit: http://www.lenntech.com/Periodic-chart-elements/Rb-en.htm

Related sites for http://www.lenntech.com/Periodic-chart-elements/Rb-en.htm

California_Odyssey_of_the_Mind_Capital_Gold_Region Newsletter, calendar, tournament information, competition results, problem synopses, and contact details.

Connecticut_Odyssey_of_the_Mind includes regional information and spontaneous area

Creativity_in_Arkansas Includes regional information and a good account on the history of CiA.

DELCAPS_-_Delaware_Creative_Activities_and_Problem_Solving Offers a competition schedule and results. Provides a calendar of events and registration forms for teams and judges.

Florida_Odyssey_of_the_Mind Includes regional information, important deadlines and fun stuff.

Georgia_Odyssey_Of_The_Mind Includes regional information and contacts.

Germany_Odyssey_of_the_Mind Includes regional information, bilingual site.

Kentucky_Odyssey_of_the_Mind Includes regional information, OotM history and creative thinking strategies.

Maine_Adventures_in_Creativity Offers competition dates, newsletter, and entry forms. Provides information for parents, as well as registration forms.

Massachusetts_Odyssey_of_the_Mind Include calendar of events and conatc to State Director.

New_York_State_Odyssey_of_the_Mind Includes calendar of events, detailed information on participating, volunteering, and coaching, news, and by-laws, policies, and procedures.

North_Carolina_OotM Includes Tournament results from all regions and regional information

Odyssey_of_the_Mind_in_Hong_Kong Regional information, history, humor.

Odyssey_World Community for Coaches, Participants, Officials. Includes resource section for many OotM aspects.

Oklahoma\'s_Odyssey_of_the_Mind Information about the program for participants, coaches, and parents. Features a newsletter, training dates, and contact information for the board of directors.

Ontario_Creative_Problem_Solvers_-__Odyssey_of_the_Mind Includes regional information, practise spontaneous problems and a humor and stories section.

Pennsylvania_Odyssey_of_the_Mind Includes regional information and a newsletter.

Texas_Odyssey_of_the_Mind News, scores, competition information, and pictures.

Vermont\'s_Odyssey_of_the_Mind_Program Offers information on tournaments, an event schedule, and handbook of rules. Also features online registration and contact information.

Virginia_Odyssey_of_the_Mind Includes regional information, spontaneous problem of the week and a newsletter.

Fundamentals_of_Sample_Age_Determination_from_its_Amino_Acid_Racemization Short introduction to this method and its biochemical bases, by Policarp Hortolà.

Andromeda_Galaxy Information about the Andromeda Galaxy with descriptions and pictures.

Arp\'s_Catalog_of_Peculiar_Galaxies Summarizes the catalog of 338 peculiar galaxy views gathered by Dr. Halton C. Arp.

Atlas_of_the_Andromeda_Galaxy Contains information and tables about the Andromeda Galaxy.

Classifying_Galaxies Includes pictures and a lesson for learning Hubble's system of classification.

Complete_Spiral_Galaxy_Pictures_Gallery Contains over 600 pictures of all spiral galaxies larger than 3 minutes of arc for all constellations in the Northern and Southern celestial hemispheres.

DIRECT_Project_Homepage Determining the distances to nearby galaxies.

Dust_in_Spiral_Galaxies HST and ISO Results.

European_Network__The_Formation_and_Evolution_of_Galaxies Purpose is to understand the creation of galaxies and the universe has evolved. Plans to study distant galaxies at optical, infrared, and radio frequencies.

Extragalactic_bookmarks List of resources dedicaced to extragalactic astronomy: Databases, projects, education ...

Faulkes_Telescope_Educational_Guide_-_Galaxies Some useful information about the formation of galaxies.

Galaxies NASA Windows to the Universe. Includes illustrations and introductory information about a variety of galaxies.

Galaxies Contains a set of notes by Nick Strobel. Topics include the structure of the Milky Way, the characteristics of other galaxies, and finding distances to other galaxies.

Galaxies Astronomy Photos from the Hubble Space Telescope, Hubble, NASA, ESO, Chandra, Gemini and Apollo mission archives. Images of space, earth, planets, stars, galaxies, nebula.

Galaxies List of galaxies with photos.

Galaxies Many selected links to websites dedicated to galaxies.

Galaxies Galaxies with their descriptions.

Galaxies Some useful information about kinds of galaxies, content of galaxies, clusters of galaxies, galaxies and cosmology.

The_Galaxy_Catalog_-_Zsolt_Frei This site contains a collection of digital images of 113 nearby galaxies.

Galaxy_classification_-_Wikipedia,_the_free_encyclopedia An article about the Galaxy classification.

This is sites2007.com cache of m/ as retrieved on 2008.12.02 sites2007.com's cache is the snapshot that we took of the page as we crawled the web. The page may have changed since that time.

Rubidium (Rb) - Chemical properties, Health and Environmental effects _uacct = "UA-54093-1"; urchinTracker();

Rubidium - Rb

Search : Contact us

Chemical properties of rubidium - Health effects of rubidium - Environmental effects of rubidium

Atomic number 37 Atomic mass 85.4678 g.mol -1 Electronegativity according to Pauling 0.8 Density 1.53 g.cm-3 at 20�C Melting point 39 �C Boiling point 696 �C Vanderwaals radius 0.243 nm Ionic radius 0.149 nm (+1) Isotopes 11 Electronic shell [ Kr ] 5s1 Energy of first ionisation 402.9 kJ.mol -1 Energy of second ionisation 2633 kJ.mol -1 Energy of third ionisation 3860 kJ.mol -1 Standard potential - 2.99 V Discovered by Robert Wilhem Bunsen and Gustav Robert Kirchhoff in 1861 Rubidium - Rb

Rubidium

Rubidium is a soft, silvery-white metallic element of the alkali metals group (Group 1). It is one of the most electropositive and alkaline elements. Rubidium can be liquid at ambient temperature, but only on a hot day given that its melting point is about 40�C. It ignites spontaneously in air and reacts violently with water and even with ice at -100 C, setting fire to the liberated hydrogen. As so with all the other alkali metals, it forms amalgams with mercury. It alloys with gold, cesium, sodium, and potassium. Its flame is yellowish-violet. Applications Rubidium and its salts have few commercial uses. The metal is used in the manufacture of photocells and in the removal of residual gases from vacuum tubes. Rubidium salts are used in glasses and ceramics and in fireworks to give them a purple colour. Potential uses are in ion engines for space vehicles, as working fluid in vapor turbines, and as getter in vacuum tubes. Rubidium in the environment Rubidium is considered to be the 16th most abundant element in the earth's crust. The relative abundance of rubidium has been reassessed in recent years and it is now suspected of being more plentiful than previously calculated. It is very like potassium and there are no environments where it is seen as a threat. No minerals of rubidium are known, but rubidium is present in significant amounts in other minerals such as lepodite (1.5%), pollucite and carnallite. It is also present in traces in trace amounts in other minerals such as zinnwaldite and leucite. The amount of rubidium produced every year is small, and what demand there is can be met from a stock of a mixed carbonate by-product that is collected during the extractium of litium from lepodite. The little rubidium that is produced is used for research purposes only, these is no incentive to seek commercial outlets for the material.

Health effects of rubidium

Effects of exposure: water reactive. Moderately toxic by ingestion. If rubidium ignites, it will cause thermal burns. Rubidium readily reacts with skin moisture to form rubidium hydroxide, which causes chemical burns of eyes and skin. Signs and symptoms of overexposure: skin and eye burns. Failure to gain weight, ataxia, hyper irritation, skin ulcers, and extreme nervousness. Medical condition aggravated by exposure: heart patients, potassium imbalance. First aid: Eye: immediately flush with running water for 15 minutes while holding eyelid. Obtain medical attention immediately. Skin: remove material and flush with soap and water. Remove contaminated clothing. Get medical attention promptly. Inhalation: move to fresh air immediately. If irritation persists, get medical attention. Ingestion: do not induce vomiting. Get medical attention immediately.

Environmental effects of rubidium

Rubidium has no known biological role but has a slight slimulatory effect on metabolis, probably because it is like potassium. The two elements are found together in minerals and soils, although potassium is much more abundant than rubidium. Plant will adsorb rubidium quite quickly. When stresses by deficiency of potassium some plants, such as sugar beet, will respond to the addition of rubidium. In this way rubidium enters the food chain and so contributes to a daily intake of between 1 and 5 mg. No negative environmental effects have been reported. Back to periodic elements. [ Home ] [ Back ] [ More Information or question on Rubidium? ] Copyright � 1998-2008 Lenntech Water treatment & air purification Holding B.V. Rotterdamseweg 402 M 2629 HH Delft, The Netherlands tel: (+31)(0)15 26.10.900 fax: (+31)(0)15 26.16.289 e-mail: info@lenntech.com

Physical	data,	chemical	properties,
and	health	effects.

http://www.lenntech.com/Periodic-chart-elements/Rb-en.htm

Lenntech: Rubidium 2008 December

dvd rental

dvd

Physical data, chemical properties, and health effects.

Rules

Recommended Sites: 1. Arts - Business - Computers - Games - Health - Home - Kids and Teens - News - Recreation - Reference - Regional - Science - Shopping - Society - Sports - World Miss Gallery - Top Anime Hentai - DVD rental by mail - Debt Help - Loans - Remortgaging - Mobile Phones - Loans

2008-12-02 15:40:59

Copyright 2005, 2006 by Webmaster
Websites is cool :)