Which of the following atoms or ions will produce strong absorption lines in the spectra of stars with relatively cool surface temperatures?
A) TiO,molecules of titanium oxide
B) He I,neutral helium
C) Mg II,ionized magnesium
D) Ca II,ionized calcium

Question

Quizplus · Accepted Answer

TiO molecules produce strong absorption lines in the spectra of stars with relatively cool surface temperatures. This is because these molecules are able to form in the cooler atmospheres of these stars and absorb specific wavelengths of light. Neutral helium (He I) and ionized magnesium (Mg II) and calcium (Ca II) are typically seen in hotter stars.

Which of the Following Atoms or Ions Will Produce Strong