def METHOD_NAME(f_params):
    """Plot f_Q."""
    import matplotlib.pyplot as plt
    x = np.linspace(0.0, 6.0, 101)
    for elem in ("Si", "Na", "Cl", "Pb", "Pb0", "Te"):
        y = [atomic_form_factor_WK1995(Q, f_params[elem]) for Q in x]
        plt.plot(x, y, label=elem)
    plt.xlim(xmin=0)
    plt.ylim(ymin=0)
    plt.legend()
    plt.show()