* Hydrogen (H): Makes up about 70.6% of the Sun's mass.

* Helium (He): Makes up about 27.4% of the Sun's mass.

These two elements are the most abundant in the universe, and they are responsible for the Sun's nuclear fusion reactions that produce its energy.

While these two elements dominate, the Sun does contain trace amounts of other elements:

* Oxygen (O): About 0.8%

* Carbon (C): About 0.3%

* Neon (Ne): About 0.2%

* Iron (Fe): About 0.1%

And even smaller amounts of:

* Silicon (Si), Magnesium (Mg), Sulfur (S), Nickel (Ni), Calcium (Ca), and others.

It's important to note that the Sun is a giant ball of plasma, not a gas. Plasma is a state of matter where atoms have been stripped of their electrons, creating a mixture of charged particles. The intense heat and pressure within the Sun cause the atoms to be ionized, resulting in this unique state.