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none. Mars Earth and Venus have relatively thick atmospheres. it was long assumed that Mercury did not have an atmosphere but a very thin atmosphere around the planet. Mercury's atmosphere is composed of: 42%O2 29%Na

22%H2

06%He 00.5%K

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14y ago
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10y ago

The planet Mercury has virtually no atmosphere.

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12y ago

mercury

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11y ago

Mercury.

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Q: Which of the inner planets does NOT show evidence of volcanic activity?
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Which inner planet does not have evidence of volcanic activity?

Thats easy mercury!


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