Which is true about stable isotopes?

Question

A. Isotope are always unstable because they are radioactive
B. Isotopes that are naturally occurring in nature are always unstable
C. Isotopes with more neutrons than protons are always table
D. A stable nucleus has a similar number of protons and neutrons

Answer 1

The correct statement regarding stable isotopes is:

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

This statement is generally true as stable isotopes tend to have a balanced ratio of protons to neutrons, which contributes to their stability.

Here is a brief explanation of why the other options are incorrect:

A. This is false because not all isotopes are unstable; many are stable and do not undergo radioactive decay.

B. This is false because there are many naturally occurring isotopes that are stable, such as carbon-12 and oxygen-16.

C. This is false because isotopes with more neutrons than protons are not necessarily stable; there are many that are unstable and radioactive. Stability depends on the specific ratio and the overall nuclear forces at play.