Question

Question #455cf

Answer 1

The ratio of protons to neutrons is `82:125` or `1:1.52`

Think it is usually compared to `1` because this gives us an idea of the stability of a nuclide(or the likelihood of a nuclide to be be radioactive)

The greater the number of protons, the higher the chances they are for that atom to be radioactive.

Hence we can say that if the proton-neutron number is greater than `1` then the nuclide will be radioactive.

So, the above arrangement of protons and neutrons designates a radioactive nucleus.

Read more about that here:

http://socratic.org/questions/how-is-nuclear-stability-related-to-the-neutron-proton-ratio