Question

When is said to be the nucleus unstable?

Answer 1

above 83 atm.no nucleus is unstable and N/p >1.5 then nucleus unstable and radioactive

Answer 2

Answer:

it is the balance of protons and neutrons

in a nucleus which determines whether a

nucleus will be stable or unstable. too many neutrons or protons upset this balance disturbing the binding energy from the strong nuclear forces making the nucleus unstable.