| Element | Percentage by Number of Atoms |
Percentage by Mass |
| Hydrogen - H | 92.0 | 73.4 |
| Helium - He | 7.8 | 25.0 |
| Oxygen - O | 0.06 | 0.8 |
| Carbon - C | 0.03 | 0.3 |
| Nitrogen - N | 0.009 | 0.1 |
| Neon - Ne | 0.008 | 0.1 |
| Silicon - Si | 0.004 | 0.07 |
| Iron - Fe | 0.003 | 0.2 |
| Magnesium - Mg | 0.003 | 0.07 |
| Sulfur - S | 0.002 | 0.04 |
| Argon - Ar | 0.0008 | 0.032 |
| Aluminum - Al | 0.00025 | 0.007 |
| Calcium - Ca | 0.00021 | 0.008 |
| Sodium - Na | 0.00020 | 0.005 |
| Nickel - Ni | 0.00020 | 0.012 |