In the current model of the atom, electrons and protons are mixed together in a solid sphere electrons travel as waves in the electron cloud that surrounds the nucleus electrons orbit around the nucleus like planets orbit the sun electrons and neutrons are located in the nucleus

The Atomic Orbital Model is the currently accepted model of the electrons in an atom. It is sometimes called the Wave Mechanics Model. In the atomic orbital model, the atom consists of a nucleus surrounded by orbiting electrons. These electrons exist in atomic orbitals, which are a set of quantum states of the negatively charged electrons trapped in the electrical field generated by the positively charged nucleus. the orbits can be likened to the planets orbiting the sun., the atomic orbital model can only be described by quantum mechanics, in which case the electrons are more accurately described as standing waves surrounding the nucleus. 

"electrons travel as waves in the electron cloud that surrounds the nucleus."