Question

One word for a)Tri-atomic gas which makes an UV rays barrier layer​

Answer 1

Your Answer:

Tri-atomic gas which makes an UV rays barrier layer​ → Ozone (O³)

The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation. It contains a high concentration of ozone (O3) in relation to other parts of the atmosphere, although still small in relation to other gases in the stratosphere.

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