Cesium vs. Caesium — What's the Difference?

A metallic element with atomic number 55, known for its high reactivity.

A chemical element with symbol Cs and atomic number 55.

Plays a crucial role in atomic clocks.

Noted for its use in atomic clocks.

Utilized in medical applications.

A conductor of electricity.

Can be found in mineral form.

Extracted primarily from mineral sources.

Used in various industries for its conductive properties.

Used in medical treatments.

A soft, silvery-white ductile, metallic element that is the most electropositive and alkaline of the elements and is used in atomic clocks and photoelectric cells and to catalyze hydrogenation of some organic compounds. The fundamental unit of time in the International System, the second, is based on the frequency of radiation between two energy states in an atom of the Cs-133 isotope. Atomic number 55; atomic weight 132.905; melting point 28.44°C; boiling point 671°C; specific gravity 1.873; valence 1. See Periodic Table.

Caesium (IUPAC spelling) (also spelled cesium in American English) is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-golden 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.

(American spelling) caesium

Variant of cesium.

The chemical element of atomic number 55. It is a univalent element, the most electropositive metal. Symbol Cs; atomic weight 132.905. IT has a melting point of 28.4° C.

The chemical element (symbol Cs) with an atomic number of 55. It is a soft, gold-colored, highly reactive alkali metal.

A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

A rare alkaline metal found in mineral water; - so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic number 55. Atomic weight 132.6.

A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

Cesium/caesium is soft, silvery-gold, and has a low melting point.

Cesium and caesium are typically extracted from the mineral pollucite.

Natural cesium is not radioactive, but cesium-137, a byproduct of nuclear reactions, is radioactive.

Due to its large atomic size and low ionization energy, cesium/caesium is highly reactive.

Cesium/caesium is highly reactive with water and air, requiring careful handling and storage.

Cesium/caesium’s precise electron transitions are used to measure time in atomic clocks.

Cesium/caesium is stored in vacuum-sealed glass ampoules or under inert gas to prevent reactivity.

Yes, cesium/caesium occurs naturally in minerals like pollucite and lepidolite.

Cesium/caesium has no known biological role and is not considered essential for life.

Cesium and caesium are used in atomic clocks, oil drilling, and medical applications.

The electron configuration of cesium/caesium is [Xe] 6s¹.

Cesium/caesium forms various compounds, including cesium chloride and cesium nitrate.

Cesium/caesium reacts violently with water, producing hydrogen gas and heat.

The atomic weight of cesium/caesium is approximately 132.9 u.

Radioactive cesium can contaminate water and soil, posing long-term environmental and health risks.