what percentage of the sun is composed of hydrogen
It comprises mostly of hydrogen and helium. Hydrogen, accounts for approximately 74 percent of the total mass of the sun, while helium accounts for 24 percent of the total mass. The other elements that the sun is comprised of are oxygen, iron, silicon, nickel, sulfur, magnesium, neon, carbon, chromium and calcium. Oxygen is 1 percent of the total mass of the sun, while the other elements constitute 1 percent of the total composition of the sun.