Mercury is 'small'
yes
mercury is the smallest planet now because Pluto's status was changed from planet to dwarf planet, making mercury the smallest planet.
Mercury is the planet that is closest to our sun.
Mercury, is the smallest planet that orbits the sun.
Air
Mercury is the smallest "rocky" planet.
You could fit just under 18 of the planet mercury inside of the planet earth. Another way to say this would be: Mercury is 18 times smaller than earth.
Mercury
No - the planet Mercury is too small and too close to the sun to possess/hold an atmosphere.
Its Mercury that has no real atmosphere due to its small size.
no planet expect Mercury