Which noble gas is most abundant in Earth's atmosphere by volume after nitrogen, oxygen, and argon?

💡 Solution & Explanation

Neon is the most abundant noble gas in the Earth's atmosphere after argon, accounting for approximately 0.0018 percent by volume. Other options like helium and krypton exist in lower concentrations of about 0.0005 percent and 0.0001 percent respectively, while xenon is even scarcer. Nitrogen constitutes the largest share of the atmosphere at roughly 78 percent. Noble gases are chemically inert and grouped in Group 18 of the periodic table.