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Which element has the most isotopes overall?
ChemistryIsotopes
Quick Answer
Cesium is among the elements with the largest number of known isotopes, with more than 30 recorded isotopes. Many are radioactive and short-lived.
The Full Story
Cesium has one of the largest sets of known isotopes among the elements, with over 30 identified isotopes. Only one isotope, cesium-133, is stable; the rest are radioactive and were identified through nuclear research. The abundance of isotopes reflects how nuclear stability changes with neutron number. Cesium-133 is especially important because the second defines the SI second in atomic clocks.
Key Facts
1.Cesium has over 30 known isotopes
2.Cesium-133 defines the SI second
3.Atomic number: 55
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Suggested video title for this topic:
"The atom family with tons of siblings"