Astronomers use roman numerals to indicate the ionization state of a gas. Ionized hydrogenis indicated by which of the following symbols?

Question

Quizplus · Accepted Answer

Ionized hydrogen is denoted as H II, indicating that it has lost one electron and is in its first ionized state. H I represents neutral hydrogen, while H III would indicate hydrogen that has lost two electrons, which is less common in astronomical contexts.

Astronomers Use Roman Numerals to Indicate the Ionization State of a Gas