What is the function of the labeled structures?

A:

B:

C:

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Photons with the highest energy have the longest period

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that decays in a nuclear transmutation 3. parent element the change of one chemical element into another by nuclear decay or radioactive bombardment 4. transmutation the time required for the decay of one-half of the atoms in a sample of radioactive material