Which is true about stable isotopes?(1 point)

The true statement about stable isotopes from the given options is:

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

This statement reflects the general trend that stable isotopes tend to have a balanced ratio of protons to neutrons, although there are exceptions. The other statements are not accurate:

- Isotopes with more neutrons than protons are not always stable; some can be unstable.
- Not all naturally occurring isotopes are unstable; many are stable.
- Not all isotopes are unstable; only radioactive isotopes are unstable.