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Which is true about about stable isotopes?

A stable nucleus has a similar number of protons and neutrons.

Isotopes are always unstable because they are radioactive.

Isotopes that are naturally occurring in nature are always unstable.

Isotopes with more neutrons than protons are always stable.

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User Joerg
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Answer:

A stable nucleus has a similar number of protons and neutrons.

Step-by-step explanation:

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User Anusreemn
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