In atomic and nuclear physics, we distinguish between the sub-nuclear scale and the atomic scale. Which of the following groups contains only particles or structures that have a characteristic size (radius or diameter) of less than 1.0 × 10-14 m?
Protons, electrons, and up quarks
Neutrons, positrons, and hydrogen atoms
Alpha particles, beta-minus particles, and helium atoms
Protons, electrons, and C60\text{C}_{60}C60 fullerene molecules