The molecular view of the process taking place at the anode in a voltaic cell is shown in the diagram below. Why are the spheres used to depict the atoms in the anode larger than those in the solution?

• A. The spheres used to depict the atoms in the anode are larger than those in the solution because the atoms in the anode gain a valence electron, form cations with smaller radii, and move into the solution.
• B. The spheres used to depict the atoms in the anode are larger than those in the solution because the atoms in the anode gain a valence electron, form anions with smaller radii, and move into the solution.
• C. The spheres used to depict the atoms in the anode are larger than those in the solution because the atoms in the anode lose a valence electron, form cations with smaller radii, and move into the solution.
• D. The spheres used to depict the atoms in the anode are larger than those in the solution because the atoms in the anode lose a valence electron, form anions with smaller radii, and move into the solution.