CESIUM

BY :
NYEISHA BARNES

Name: Cesium
Symbol: Cs
Atomic Number: 55
Atomic Mass: 132.90546 amu
Melting Point: 28.5 °C (301.65 K, 83.3 °F)
Boiling Point: 678.4 °C (951.55005 K, 1253.12 °F)
Number of Protons/Electrons: 55
Number of Neutrons: 78
Classification: Alkali Metal
Crystal Structure: Cubic
Density: 293 K: 1.873 g/cm3
Color: silver
British Spelling: Caesium
IUPAC Spelling: Caesim


  Isotope  Half Life

  1. Cs-1261.6 minutes
  2. Cs-129100.3 days
  3. Cs-1319.7 days
  4. Cs-1326.4 days
  5. Cs-133Stable
  6. Cs-1342.1 years
  7. Cs-134m2.9 hours
  8. Cs-1352300000.0 years
  9. Cs-13613.2 days
  10. Cs-13730.2 years
  11. Cs-13832.2 minutes
  12. Cs-1399.3 minutes

Date of Discovery: 1860
Discoverer: Fustov Kirchoff
Name Origin: From the Latin word caesius (sky blue)
Uses: removes air traces in vacuum tubes
Obtained From: pollucite, lepidolite

   

NORMAL PHASE:  SOILD

TEXTURE: SMOOTH, SOFT

APPEARANCE: SHINY

HARDNEESS: SOFT METAL

COMMON OXIDATION NUMBER : +1

REACTS WITH: WATER

HALF LIFE: CS- 135 , 2300000.0 YEARS

FUN FACT

Cesium was discovered in 1860 by German chemists Robert Bunsen and Gustav Kirchhoff through spectroscopic analysis of mineral water from the Durkheim region of Germany. They named it cesium after the sky-blue lines in its spectrum.Cesium is a silvery-white alkali metal that is very soft and ductile. It has the second lowest melting point of all metallic elements and is liquid near room temperature. Besides two bright blue lines in its spectrum, it also has red, yellow and green wavelengths.Cesium reacts aggressively when combined with water and ice to form cesium hydroxide (CsOH). Cesium hydroxide is the strongest base available and can attack glass.

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