* Hydrogen (H): About 70.6% of the sun's mass.

* Helium (He): About 27.4% of the sun's mass.

The remaining 2% is made up of heavier elements, such as:

* Oxygen (O)

* Carbon (C)

* Neon (Ne)

* Iron (Fe)

These heavier elements are much less abundant but play important roles in the sun's energy production and structure.