The video shows a diagram of an atom with a nucleus and electrons. The nucleus is represented by a purple circle with a plus sign in the center, and the electrons are represented by green circles with a plus sign. The diagram is set against a blue background. There is a white arrow pointing from the nucleus to the electrons, indicating the flow of energy. The video also includes text labels such as "nucleus (neutered)" and "parent nucleus" to describe the different parts of the atom.