Four positively charged particals are at various distances from a positively charged plate the particles are equally charged and do not influence each other which particle has the greatest potential energy

Answer/nitrogen compounds in the soil;

Catalysts and intermediateshope i

When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon. the wavelength (or equivalently, frequency) of the photon is determined by the difference in energy between the two states. these emitted photons form the element's spectrum.