page 10 11. A neutron consists of one up quark and two down quarks. A neutron is a A gluon B meson C baryon D lepton E boson. 12. The following statement represents a nuclear fusion reaction. 3 2 4 1 1 1 2 0 H H He n    The total mass of the particles before the reaction is 8.347 × 10−27 kg. The total mass of the particles after the reaction is 8.317 × 10−27 kg. The energy released in this reaction is A 3.0 × 10−29 J B 9.0 × 10−21 J C 1.4 × 10−12 J D 2.7 × 10−12 J E 7.5 × 10−10 J. 13. A student makes the following statements about wave particle duality. I The photoelectric effect is evidence supporting the particle model of light. II Interference is evidence supporting the wave model of light. III Photons of sufficient energy can eject electrons from the surface of metals. Which of these statements is/are correct? A I only B II only C III only D I and III only E I, II and III