which part of an atom is responsible for the phenomenon of line spectra? a electrons b neutrons c protons d…

Brief Explanations:

Line spectra are produced when electrons in an atom transition between energy levels. When an electron moves from a higher - energy level to a lower - energy level, it emits a photon of light with a specific wavelength. The wavelengths of these photons correspond to the lines in the line spectrum. Neutrons have no charge and do not directly participate in such electromagnetic processes related to line spectra. Protons are in the nucleus and their main role is in determining the atomic number and nuclear properties, not in the emission of light for line spectra. Quarks are sub - particles that make up protons and neutrons and are not directly involved in the phenomenon of line spectra.

Answer:

A. electrons