it is kind of gas but little water
Respiration
Atmosphere-if it has one
ice
No. Pluto's surface is made mostly of frozen nitrogen.
yes carbon dioxide can be ionised just by gasous ionisation
This is a process called Electrolysis. Water is H20 ie it has two hyrogen atoms and one oxygen bonded together - the electric current seperates them and they form their normal gasous states.Water does all sorts of cool stuff due to this structure.
The Earth is terrestrial rather than gaseous. There are several planets in the solar system that are considered to be gaseous but the Earth and Mars and even Pluto are terrestrial.
Iodine is an element and its special property is sublimation, this is a physical change from solid iodine to gasous iodine with no liquid phase(or state) in between.
Venus is a rocky planet similar to Earth. The Solar System has 4 rocky planets: Mercury, Venus, Earth and Mars. The rest are gas giants.
O3 exists also its called ozone,the differences are that O2 that your aware of is more stable and the main form of gasous oxygen at this pressure,ozone is found further up in the sky and is toxic to humans
There is no particular reason why the outer planets are gas and the inner planets are rock, but the outer planets have icy cores because they are all far away from the sun.
Acetone is naturally a liquid in nail polish remover. A gas is defined as a substance that exists in the gasous state a room tempeature. A vapor however is the gasous state of a substance this generally a liquid at room tempeature. So it is a vapor.