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I. Zero mass - (B) Neutrino: Neutrinos are subatomic particles that have a very small mass, but it is not exactly zero. However, compared to other particles, neutrinos have such a tiny mass that for many practical purposes, they can be considered to have zero mass.
II. Fractional charge - (C) Quark: Quarks are elementary particles that make up protons and neutrons, which are the building blocks of atomic nuclei. Quarks have fractional electric charges, meaning they carry a charge that is a fraction of the elementary charge.
III. Fractional spin - (A) Positron: Positrons are the antiparticles of electrons. Both electrons and positrons have a spin of 1/2, which is considered a half-integer or fractional spin.
IV. Integral spin - (D) Phonon: Phonons are not particles themselves but rather collective excitations or quanta of lattice vibrations in solids. They can be described as particles with integral spins (0, 1, 2, etc.), representing the quantization of vibrational energy in the crystal lattice.
Therefore, the correct matching of characteristics with the corresponding particles is:
I. Zero mass - (B) Neutrino
II. Fractional charge - (C) Quark
III. Fractional spin - (A) Positron
IV. Integral spin - (D) Phonon