(ii) Arrange the following metals in decreasing order of their reactivity:
Fe, Zn, Na, Cu, Ag​

answer; i do believe the correct answer is (river); /// good luck

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.