Elements such as iron,calcium,and titanium are less abundant in the interstellar medium than in the sun.This is most likely due to these elements
A) not producing spectral lines,and hence we underestimate their abundances.
B) being destroyed by ultraviolet photons.
C) having condensed to form dust grains.
D) being created in the photospheres of stars like the sun and not in low density gas clouds.
E) forming the coronal gas that only emits x-rays.

Question

Quizplus · Accepted Answer

These elements are less abundant in the interstellar medium because they tend to condense into solid dust grains, which makes them less detectable in their gaseous form.

Elements Such as Iron,calcium,and Titanium Are Less Abundant in the Interstellar