As more information was gathered about the structure of the atom, atomic models changed over time. maxwell planck discovered that the energies of electrons were quantized. in other words, electrons could only exist in certain energy levels. which model best shows this concept?

Neils Bohr developed a model of the atom (Bohr model) to explain how the structure of the atom changes when it undergoes energy changes. His major idea was that energy of the atom was quantized (this means that the atom could only have very specific amounts of energy) and the amount of energy in the atom was related to the electrons possession in the atom. In the Bohr model, electrons travel in orbits around the nucleus. The further the electron from the nucleus the more energy it has. Bohr used Planck's quantum concept of E=hv.

Antibodies develop to fight off the virus.

Explanation:

Antibodies develop while you get a virus, which helps fight off the virus and protect you from getting it again.