Can you give more information?
Answer:
Why some elements are radioactive (unstable). 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.
Explanation:
hope this helps
3024.75 Joules needed to warm iron
I think the answer is A. breaks rocks apart.
They work by lowering the activation energy
