Which of the following is the best metaphor for an atom? A. A jigsaw puzzle piece B. A lego block C. A box

Answer:A boxExplanation:In quantum mechanics, the atom is metaphorically described as a box. In fact, the Schrödinger wave equation is based on the three dimensional box metaphor of the atom.Thus, a box provides a convenient treatment of the atom as it represents the fundamental components of the problem of atomic structure, hence the answer.