Question

thermal windows often have all the air pumped out between the panes and a gas pumped in that is not harmful and wont react with othet things. what gas would be used

Answer 1

C. Ar or Argon

It is the most commonly used gas between thermal window panes. Argon has 34% lower thermal conductivity than air and is therefore more suitable to be used instead of air. It is also inert and does not react or causes any form of harm.