True or False: The stability of a nucleus is determined by the balance of forces within it.

The statement is true because the stability of a nucleus is indeed determined by the balance of forces within it. In an atomic nucleus, protons and neutrons are held together by the strong nuclear force, which is a powerful but short-range force. This force needs to counterbalance the electromagnetic repulsion between the positively charged protons. When the numbers of protons and neutrons are in a favorable ratio, the balance of these forces typically results in a stable nucleus. However, if there are too many or too few neutrons compared to protons, the nuclear forces can become unbalanced, leading to instability and radioactive decay.

Understanding this balance of forces is crucial in fields such as nuclear physics and radon measurement since radon is a radioactive gas formed from the decay of uranium and thorium in the earth, and its stability is directly related to its nuclear composition.