Emission spectra from interstellar gas clouds glow with a variety of colors. Red usually indicates hydrogen, and green is usually a characteristic of
A) helium.
B) oxygen.
C) carbon.
D) uranium.

Question

Quizplus · Accepted Answer

Green emission in interstellar gas clouds is typically characteristic of oxygen, especially when ionized, producing distinct green lines in the emission spectrum.

Emission Spectra from Interstellar Gas Clouds Glow with a Variety