* Hydrogen (H2): Around 96% of the atmosphere.

* Helium (He): About 3% of the atmosphere.

In smaller amounts, Saturn's atmosphere also contains:

* Methane (CH4): Gives Saturn its pale yellow color.

* Ammonia (NH3): Forms ice crystals in the upper atmosphere.

* Phosphine (PH3): A trace gas.

* Water (H2O): Present in deeper layers.

* Hydrocarbons: More complex hydrocarbons, like ethane (C2H6) and acetylene (C2H2), are also found.

It's important to note that these are just the major components. There are likely other trace gases present in Saturn's atmosphere that haven't yet been fully identified.