Which of the following substances is the most abundant in the universe?
Carbon
Air
Water
Oxygen
Hydrogen
Correct answer is E
Element Abundance
Hydrogen 40,000
Helium 3,100
Oxygen 22
Neon 8.6
Nitrogen 6.6
Carbon 3.5
Silicon 1
Magnesium 0.91
Iron 0.6
Sulfur 0.38