Yes.
True. The length of time that it takes to complete one orbit around the Sun is directly related to the distance of the orbit from the Sun.
Neptune and Pluto are the only planets in our solar system that are further away from the sun than Uranus. Neptune is the eighth planet from the sun, while Pluto, although now classified as a dwarf planet, has a highly elliptical orbit that takes it even farther from the sun than Neptune at certain points in its orbit.
That is correct it is no longer a planet.
Yes, it is
It no longer exists on the planet
A planet must be large enough for its gravity to pull it into a nearly round shape. In our solar system, a planet needs to have cleared its orbit of other debris to be considered a true planet.
It is not gone. It has been re-classified from being a planet to being a dwarf planet. This is due to its size and the nature of its orbit.
The planet with the highest eccentricity (in other words the most stretched or elongated ellipse) in our solar system is Mercury, with an eccentricity of about 0.21. (Pluto's is higher but is no longer considered a true planet). By contrast, Venus is the most nearly a perfect circle with an eccentricity of about 0.007.
It was determined as recently as 2010 that Pluto does not qualify as a true planet due to its gaseous mass formation, illegitimate shape, and irregular orbit. We are back to eight planets until final confirmation of Planet X as the true ninth planet.
All planets have at least some elongation or orbital eccentricity and thus not a perfectly circular orbit. Since Pluto was demoted from true planet status, Mercury is now the planet with highest eccentricity (of about 0.21)
No. That would be Uranus.
Pluto!