The hydrogen would rapidly escape into space, leaving behind an atmosphere of oxygen gas.

This is why hydrogen escapes from an atmosphere more easily than does carbon dioxide.

At the end of the foaming process, the hydrogen escapes into the atmosphere and is replaced by air.

The station has no roof, in order to allow any leaked hydrogen to escape to the atmosphere.

The hydrogen escaped to space, and the oxygen and remnant water made sulphuric acid in the clouds.

Their hydrogen escaped to space, the oxygen united with materials below.

This hydrogen quickly escapes into the space serving as a source of plasma in the magnetosphere of Neptune.

The hydrogen escaped, and the Victoria quietly descended into the ravine.

The hydrogen can then escape from the atmosphere and the oxygen recombines.

Thus, they concluded, the hydrogen "must be escaping the planetary atmosphere."