Question

why some elements are radioactive but some are not​

Answer 1

Answer:

When the atoms of an element have extra neutrons or protons it creates extra energy in the nucleus and causes the atom to become unbalanced or unstable. Whether radioactive elements can become stable and if so, how. The unstable nucleus of radioactive atoms emit radiation

Answer 2

Answer:

Some elements have radioactive properties that's why they are radioactive and some doesn't