The most significant feature of Mercury is that it is a liquid at rtp, which is different from all other metals which are solids at rtp. In addition, Mercury is very toxic.
no
no
no
yes
Yes.
yes they have craters,but that is all
Yes. There is night on Mercury and features on the surface cast shadows.
Venus Does not have any known moons like Mercury (If caduceus isn't a moon) but it does have interesting features.
the are beast
crater's
to tell you the truth mercury is basically a planet that looks like the the moon.
Mercury (the planet): Has a lot of craters. Side facing sun can be up to 800 degrees F. Other side can be as low as -400 degrees F. Mercury (gas): If a human is exposed to mercury, they can suffer brain damage.