Where is Nitrogen most abundant on Earth?

What would be the greatest mass for the earth (assuming the same size) that would allow the Nitrogen to escape?

• What would be the greatest mass for the earth (assuming the same size) that would allow the Nitrogen to escape from the atmosphere (as a ratio of it's current mass)

• Answer:

  Actually it would be a photon's worth of mass. Since 1,000's of trillions of them hit the earth's upper atmosphere every day, for at least the last 4 + billion years, we're lost an estimated 50% of our air supply. Just by having photons nudging atoms away from our atmosphere. http://www.esa.int/esaSC/SEMQ8LKRQJF_index_0.html http://www.ifa.hawaii.edu/~meech/a281/handouts/SciAm_Air.pdf