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Is an atom with a nucleus of 31 protons and 31 neutrons a stable isotope?

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Kalahira Kalahira

26-10-2017

No. Since the atom has 31 protons, that means it's an isotope of gallium. Looking up gallium, you can determine that in nature it's composed of the two stable isotopes, gallium-69 and gallium-71, which have 38 and 40 neutrons respectively. Looking further, you will find that gallium-62 has a half life of 116.18 milliseconds which means it's quite unstable.

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