Frozen O2\text { Frozen } \mathrm{O}_{2} Frozen O2
Frozen CO2\text { Frozen } \mathrm{CO}_{2} Frozen CO2
Frozen N2\text { Frozen } \mathrm{N}_{2} Frozen N2
Frozen H2\text { Frozen } \mathrm{H}_{2} Frozen H2
Frozen CO \text { Frozen CO } Frozen CO
