Ligher gases like H_(2), He etc. are rate in the atmosphere of Earth.

1.	Ligher gases like H_(2), He etc. are rate in the atmosphere of Earth. Why ?
Answer» <html><body><p></p>Solution :It is so because the `rms` velocity of lighter <a href="https://interviewquestions.tuteehub.com/tag/gasses-1003932" style="font-weight:bold;" target="_blank" title="Click to know more about GASSES">GASSES</a> like `H_(2)`, <a href="https://interviewquestions.tuteehub.com/tag/etc-975753" style="font-weight:bold;" target="_blank" title="Click to know more about ETC">ETC</a>. is greater than the escape velocity at the Earth's surface. <a href="https://interviewquestions.tuteehub.com/tag/due-433472" style="font-weight:bold;" target="_blank" title="Click to know more about DUE">DUE</a> to it, the lighter gases have escaped from the Earth's surface and their <a href="https://interviewquestions.tuteehub.com/tag/presence-25557" style="font-weight:bold;" target="_blank" title="Click to know more about PRESENCE">PRESENCE</a> is air the atmosphere of Earth.</body></html>

Ligher gases like H_(2), He etc. are rate in the atmosphere of Earth. Why ?