Caesium Facts

Caesium Facts
Caesium (Cs) has an atomic number of fifty-five and fifty-five protons in the nucleus. A silvery-gold, soft metal, it is the most alkaline element on Earth.
Interesting Caesium Facts:
Caesium was discovered by Robert Bunsen and Gustav Kirchhoff in 1860.
Its name, which is Latin for "sky blue," comes from the blue emission lines it gives off in spectroscopy.
It was the first element ever to be discovered using the newly created spectroscope.
Its discoverers had invented the spectroscope the year before.
The International System of Measurements bases the formal definition of one second on the length of time it takes caesium to absorbs cycles of light.
While caesium is mined from minerals like pollucite, it is also a byproduct of nuclear fission in reactors.
It is a rare element, present in the Earth's crust at around three parts per million.
Caesium is the 45th most common element in the crust, and the 36th most common of the metal elements.
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.
The caesium-potassium-sodium alloy has the lowest melting point of any alloy.
Caesium is pyrophoric and spontaneously combusts in air.
Caesium immediately explodes in water.
Because of these properties, caesium is stored and transported in mineral oil.
It is regarded as and handled as a hazardous material.
Caesium has thirty-nine known isotopes.
Caesium has only one stable isotope, Cs-133.
One radioactive isotope, Cs-135, has a half-life of around 2.3 million years, as it is one of uranium's long-lived fission products.
The shortest half-lives of any radioisotopes of caesium are measured in fractions of seconds.
Caesium is geochemically considered an incompatible element due to its ionic radius.
Caesium mining from pollucite ore is a slow process, as it involves hand sorting the crushed samples.
Caesium plays a vital role in usable energy production.
It is used to create drilling fluids for the petroleum industry, converting heat energy in the electrical production industry, and in nuclear reactors.

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