Probably either helium or carbon, depending on how far the Sun's evolution goes. There will still be plenty of hydrogen; even when hydrogen fusion ceases, it won't be because it was all gone.
Hydrogen still comprises the largest fraction of the sun's mass, though the sun continues to fuse that element into helium.
Hydrogen gas is the predominant element of the sun, accounting for some 74% of its mass, and 92% of its volume.
The predominant element in the Sun is hydrogen, and then helium: by mass, it is 70% hydrogen, 28% helium, 1.5% carbon, nitrogen and oxygen, and 0.5% all other elements.
Hydrogen
Hydrogen and Helium are the predominant gases in stars and in the rest of the universe.
Hydrogen still comprises the largest fraction of the sun's mass, though the sun continues to fuse that element into helium.
Hydrogen gas is the predominant element of the sun, accounting for some 74% of its mass, and 92% of its volume.
The predominant element in the Sun is hydrogen, and then helium: by mass, it is 70% hydrogen, 28% helium, 1.5% carbon, nitrogen and oxygen, and 0.5% all other elements.
Hydrogen
The predominant element in the Sun is hydrogen, and then helium: by mass, it is 70% hydrogen, 28% helium, 1.5% carbon, nitrogen and oxygen, and 0.5% all other elements.
Hydrogen is the most common element in the universe, and in the Sun.
The sun's main present element is hydrogen.
Hydrogen and Helium are the predominant gases in stars and in the rest of the universe.
The element Hydrogen .
The element Hydrogen .
The element uranium is named for the seventh planet from the Sun, Uranus.
Helium. (Helios = the sun)