Which came first M or O

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j