Where are protons, neutrons, and electrons in the atom?

The protons and the neutron are located in the nucleus and the electrons is the outermost region

mistakes are ok

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.