Caesium is the most electropositive chemical element. [17] The caesium ion is also larger and less "hard" than those of the lighter alkali metals.

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Mar 13, 2025 · Cesium, chemical element of Group 1 (also called Group Ia) of the periodic table, the alkali metal group, and the first element to be discovered spectroscopically (1860), by German scientists Robert Bunsen and Gustav Kirchhoff, who named it for the unique blue lines of its spectrum (from the Latin caesius, ‘sky-blue’).

Caesium is considered the first element who was discovered spectroscopically in 1860 by Robert Bunsen and Gustav Kirchhoff. They also derived its name from Latin caesius ‘’sky-blue’’ due to the formation of unique blue lines in the emission spectrum.

Element Caesium (Cs), Group 1, Atomic Number 55, s-block, Mass 132.905. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.

Caesium (or cesium) is the chemical element with the atomic number 55 on the periodic table. Its symbol is Cs. Caesium is an alkali metal. Its melting point is low (28 °C). It is extremely reactive. Because of its high reactivity, it is a dangerous chemical. It may set itself on fire (ignite) in air. It explodes on contact with water.

Aug 15, 2009 · Caesium or cesium (Template:PronEng) is the chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-gold alkali metal with a melting point of 28 °C (83 °F), which makes it one of only five metals that are liquid at or near room temperature. [2]

Caesium is the chemical element that has literally redefined a time. All thanks to Caesium, the entire world now keeps the time so accurately that it has forced us to reconsider what time really is; although, today new elements are discovered that are far better than caesium but it introduced a bizarre bug into timekeeping.

Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. Caesium has physical and chemical properties similar to those of rubidium and potassium.

May 24, 2022 · It becomes a liquid element at 28.5 °C or 83.3 °F. Like gallium, it is a metal you can melt in the palm of your hand (but please don’t). Here is a collection of interesting cesium facts, including the element’s properties, uses, and sources. Basic Cesium Facts Name: Cesium (ASC, American) or Caesium (IUPAC, international) Symbol: Cs