Arsenic
Arsenic possesses limited astronomical significance owing to its relatively sparse presence within cosmic realms in comparison to more prevalent elements. Arising from nucleosynthesis processes within stars, arsenic exists in minor quantities across cosmic environments, posing challenges in its detection and comprehensive analysis. Its spectral lines, primarily observable in the infrared and far-infrared spectra, present difficulties in accurate identification due to its scarcity and weaker spectral features. Detected in trace amounts within the interstellar medium, arsenic contributes minimally to the observed chemical composition in interstellar clouds.