# Is there a gas present in the Martian atmosphere similar to hydrogen?

is there a gas present in the Martian atmosphere which could be extracted to inflate a balloon with sufficient lift to support an instrument platform for low altitude reconnaissance.

No, unfortunately there's not a hydrogen-like gas in the Martian atmosphere. However, since such atmosphere is mainly composed of CO$$_2$$, we can approximate in good measure that any lighter gas could provide lift (if inflated with sufficient quantity of it) enough for the purpose, and as I've seen, Oxygen, Argon or Nitrogen, which are 'abundant' in Mars' atmosphere could be used for such purpose.