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Which element has the fewest stable isotopes?
Quick Answer
Beryllium has only one stable isotope, beryllium-9.
The Full Story
Beryllium stands out for having just one stable isotope, beryllium-9. Many other elements have multiple stable isotopes, but beryllium’s nuclear structure only supports this single stable form. That makes it a useful example in nuclear chemistry and isotope studies. Although beryllium is rare and toxic, it has important uses in aerospace and specialized alloys.
Key Facts
1.Beryllium has 1 stable isotope
2.Stable isotope: beryllium-9
3.Element symbol: Be
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"The element with only one stable isotope"
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