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maxonik [38]
3 years ago
9

Which isotope has the longest half-life?

Biology
2 answers:
mina [271]3 years ago
6 0

Answer:

Bismuth-209 (209Bi) is the isotope of bismuth with the longest known half-life of any radioisotope that undergoes α-decay (alpha decay). It has 83 protons and a magic number of 126 neutrons, and an atomic mass of 208.9803987 amu (atomic mass units). Primordial bismuth consists entirely of this isotope.

Explanation:

Hope this helps!

:)

densk [106]3 years ago
3 0

Answer: Bismuth-209

Explanation:

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