Cesium
Cesium is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28.5°C (83.3°F), which makes it one of only five elemental metals that are liquid at or near room temperature.
Physical Properties
- Atomic Number: 55
- Symbol: Cs
- Atomic Mass: 132.91
- Melting Point: 28.5°C (83.3°F)
- Boiling Point: 671°C (1,240°F)
- Density: 1.93 grams per cubic centimeter
Chemical Properties
Cesium is highly reactive and is the most reactive of all the metals. It reacts explosively with water, producing cesium hydroxide and hydrogen gas. It also reacts with air, halogens, and other non-metallic elements.
Common Uses
Cesium is used in a variety of applications, including:
- Atomic clocks
- Photoelectric cells
- Cesium vapor thermionic generators
- Organic light-emitting diodes (OLEDs)
- Medical imaging devices
Study Guide
If you're studying cesium, here are some key points to focus on:
- Understand the physical and chemical properties of cesium, including its atomic number, melting point, reactivity, and common uses.
- Learn about the unique characteristics of cesium and how they contribute to its various applications in technology and science.
- Explore the historical significance of cesium and its discovery, as well as its role in modern research and industry.
- Practice identifying cesium on the periodic table and understanding its placement within the alkali metal group.
- Review any relevant equations or formulas related to cesium's properties and behavior in different environments.
By mastering these concepts, you'll gain a comprehensive understanding of cesium and its significance in the field of physics and chemistry.
[Cesium] Related Worksheets and Study Guides:
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