| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,765,228,902 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
caesium |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.01 sec. |
|
caesium (US), cesium a ductile silvery-white element of the alkali metal group that is the most electropositive metal. It occurs in pollucite and lepidolite and is used in photocells. The radioisotope caesium-137, with a half-life of 30.2 years, is used in radiotherapy. Symbol: Cs; atomic no.: 55; atomic wt.: 132.90543; valency: 1; relative density: 1.873; melting pt.: 28.39±0.01°C; boiling pt.: 671°C How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | |
|---|---|---|
[Cicero], IV, xlix 63: Effictio est cum exprimatur atque effingitur verbis corporis cuispiam forma quoad satis sit ad intellegendum, hoc modo: 'Hunc, iudices, dico, rubrum, brevem, incurvum, canum, subscrispum, caesium, cui sane magna esta in mento cicatrix. Caesium is the element that travelled the furthest. The caesium isotopes have relatively longer half-lives and cause longer-term exposures through ingestion and external exposure from their deposition on the ground. |
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|