Difference between revisions of "Cesium"
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Cs; caesium (IUPAC); cesium (US,. Ned., Sven.); césium (Fr.); Cäsium (Deut.); cesio (It., Esp.); Césio (Port.) | Cs; caesium (IUPAC); cesium (US,. Ned., Sven.); césium (Fr.); Cäsium (Deut.); cesio (It., Esp.); Césio (Port.) | ||
| − | == | + | == Risks == |
| − | Flame color is blue to purple. Violently decomposes in water with the evolution of hydrogen. Soluble in liquid ammonia. | + | * Metallic cesium can ignite spontaneously in moist air. |
| + | * Dangerous fire and explosion risk. | ||
| + | * Reacts violently with oxidizing materials. | ||
| + | * Burns skin. | ||
| + | * Fisher Scientific: [https://fscimage.fishersci.com/msds/42665.htm MSDS] | ||
| + | |||
| + | ==Physical and Chemical Properties== | ||
| + | |||
| + | * Flame color is blue to purple. | ||
| + | * Violently decomposes in water with the evolution of hydrogen. | ||
| + | * Soluble in liquid ammonia. | ||
{| class="wikitable" | {| class="wikitable" | ||
| Line 23: | Line 33: | ||
|- | |- | ||
! scope="row"| Melting Point | ! scope="row"| Melting Point | ||
| − | | 28.5 | + | | 28.5 C |
|- | |- | ||
! scope="row"| Density | ! scope="row"| Density | ||
| − | | 1.873 | + | | 1.873 g/ml |
|- | |- | ||
! scope="row"| Molecular Weight | ! scope="row"| Molecular Weight | ||
| Line 32: | Line 42: | ||
|- | |- | ||
! scope="row"| Boiling Point | ! scope="row"| Boiling Point | ||
| − | | 705 | + | | 705 C |
|} | |} | ||
| − | == | + | ==Resources and Citations== |
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | + | * Web Elements: [http://www.webelements.com/webelements/elements/text/Cs/key.html Website] | |
* G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 180 | * G.S.Brady, ''Materials Handbook'', McGraw-Hill Book Co., New York, 1971 Comment: p. 180 | ||
Latest revision as of 08:05, 28 May 2022
Description
An element in the alkali metal group. Cesium has an abundance of 1 ppm in the earth's crust. It occurs in the minerals pollucite and lepidolite. Cesium was discovered in 1860 by Robert Bunsen and Gustav Kirchhoff. It is a soft, silvery white metal that tarnishes on contact with air and can ignite spontaneously in moist air. Cesium is used as a catalyst for polymers and as a radioactive emitter in atomic clocks. It is also used in photoelectric sensors for security devices and cameras.
Synonyms and Related Terms
Cs; caesium (IUPAC); cesium (US,. Ned., Sven.); césium (Fr.); Cäsium (Deut.); cesio (It., Esp.); Césio (Port.)
Risks
- Metallic cesium can ignite spontaneously in moist air.
- Dangerous fire and explosion risk.
- Reacts violently with oxidizing materials.
- Burns skin.
- Fisher Scientific: MSDS
Physical and Chemical Properties
- Flame color is blue to purple.
- Violently decomposes in water with the evolution of hydrogen.
- Soluble in liquid ammonia.
| Composition | Cs (atomic no. 55) |
|---|---|
| CAS | 7440-46-2 |
| Mohs Hardness | 0.2 |
| Melting Point | 28.5 C |
| Density | 1.873 g/ml |
| Molecular Weight | atomic wt. =132.9054 |
| Boiling Point | 705 C |
Resources and Citations
- Web Elements: Website
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 180
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The Merck Index, Martha Windholz (ed.), Merck Research Labs, Rahway NJ, 10th edition, 1983 Comment: entry 2051
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998