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In which layer is helium found in the atmosphere? and what is width of the atmosphere?

In which layer is helium found in the atmosphere? and what is width of the atmosphere?
 

Grade:11

1 Answers

RAVI
14 Points
8 years ago

Exosphere

This layer is mainly composed of extremely low densities of hydrogen, helium and several heavier molecules including nitrogen, oxygen and carbon dioxide closer to the exobase.
The exosphere is the outermost layer of Earth's atmosphere (i.e. the upper limit of the atmosphere). It extends from the exobase, which is located at the top of the thermosphere at an altitude of about 700 km above sea level, to about 10,000 km (6,200 mi; 33,000,000 ft). The exosphere merges with the emptiness of outer space, where there is no atmosphere.

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