Very hot
No, there are no cloud conditions in Mercury
there is not any air on Mercury
Not for human beings.
There is no atmosphere on Mercury
Mercury can be seen with or without a telescope, depending on the conditions.
mey
Not for human beings.
No. Mercury has no atmosphere to speak of, and therefore no weather or climate.
The liquid metal in many thermometer is mercury (Hg).
Mercury is the only metal that is liquid at standard conditions for temperature and pressure
No person or machine from Earth has ever landed on Mercury, so we cannot know for certain, but the conditions on Mercury make it essentially impossible for there to be life as we know it on that planet.
Yes, Mercury can sublime, or transition directly from a solid to a gas at certain conditions. Because of its low boiling point, Mercury can evaporate at room temperature, creating a vapor that is toxic to humans.