Ayudenme con este pls, y con su explicacion paso a paso

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?