Celsium

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by DaniaSalah
Last updated 4 years ago

Discipline:
Science
Subject:
Chemical Elements

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Celsium

HISTORY OF CESIUM

Cesium is a soft, silvery, extremely reactive metal. It was discovered by Gustav Kirchhoff and Robert Bunsen in 1860 at Heidelberg, Germany. They examined mineral water from Durkheim and observed lines in the spectrum which they did not recognize, and that meant a new element was present.

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DID YOU KNOW?

- Atomic Number: 55- Atomic Mass: 132.905 amu- Number of protons: 55 - Number of neutrons: 78- Number of electrons: 55 - Boiling/melting point: 671°C/28.5°C- Element category: Alkali metal- Period/Group: 6/1**Also called Ceasium**

BASIC INFORMATION

PHYSICAL - Standard State (phase): Solid - Density (near room temp.): 1.93g/cm³ - Liquid Density (at melting point): 1.843g/cm³ - Melting Point (°C): 28°C - Melting Point (°F): 83°F - Boiling Point (°C): 671°C - Boiling Point (°F): 1240°F

CHEMICAL- Cesium metal reacts rapidly with water to form a colourless solution of caesium hydroxide (CsOH) and hydrogen gas (H2).- Cesium metal reacts vigorously with all the halogens to form caesium halides.- Cesium metal dissolves readily in dilute sulphuric acid to form solutions containing the aquated Cs(I) ion together with hydrogen gas, H2.

PROPERTIES

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USES OF CESIUM- The most common use for caesium compounds is as a drilling fluid. - Often used as a “getter” or material that combines with and removes trace gases from vacuum tubes. - Used in atomic clocks.- Used in photoelectric cells.- Used as a catalyst for the hydrogenation of several organic compounds.- They are also used to make special optical glass.

~ CESIUM ~

- The name comes from the Latin 'caesius', meaning sky blue.- It was the first element ever to be discovered using the newly created spectroscope.- Caesium is one of five elements that are a liquid at room temperature.- Only mercury is a metal that has a lower melting point than caesium.- It is regarded as and handled as a hazardous material. - It is highly explosive when exposed to water; very reactive.- Cesium can be melted by body temprature.

LINK:https://www.youtube.com/watch?v=uixxJtJPVXk


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