Which is true about stable isotopes?(1 point)

Question

Responses

Isotopes with more neutrons than protons are always stable.
Isotopes with more neutrons than protons are always stable.

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

Isotopes that are naturally occurring in nature are always unstable.
Isotopes that are naturally occurring in nature are always unstable.

Isotopes are always unstable because they are radioactive.

Answer 1

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.