The arrangement of particles in crystal lattices can be studied using

Explanation: The technique used to study the arrangement of particles in a crystal lattice is X-ray diffraction. X-rays have wavelengths comparable to the spacing between atoms in a crystal, making them ideal for probing the crystal structure.

• β-rays (electrons) → not used for lattice structure studies.
• α-rays (helium nuclei) → used in Rutherford’s scattering, not for crystal lattices.
• γ-rays → very high energy, too short wavelength for crystal diffraction.

Final Answer: X-rays